%% PLEASE DO NOT MARK any spoilers just because they reveal the existence of Sunny, Faraway, and/or what Sunny's waking friends have become like on the outside. All other major spoilers must be tagged, though.
%% !!!
%% !!!
%% !!!
! All spoilers pertaining to the game's FirstEpisodeTwist are unmarked. Administrivia/YouHaveBeenWarned.

[[quoteright:350:https://static.tvtropes.org/pmwiki/pub/images/omori.jpg]]
[[caption-width-right:350:Welcome to White Space. [[note]]You have been living here for as long as you can remember.[[/note]]]]

->''Don't worry... Everything is going to be okay...''

''[[https://www.omori-game.com/en OMORI]]'' is an adventure [[PsychologicalHorror psychological]]/[[SurrealHorror surreal horror]] RPG from artist Omocat, based off of her [[Webcomic/{{Omoriboy}} comic of the same name]]. It tells the story of the depressed, [[TheQuietOne quiet shut-in]] Omori and his five friends as they go on adventures through the [[DreamLand technicolor dreamworld]] they inhabit.

Omori's home is White Space, an [[WhiteVoidRoom empty white void]] containing only Omori's sketchbook, laptop, cat, box of tissues, and the door to the Neighbor's Room where Omori's friends live. These include the [[GirlyGirlWithATomboyStreak plucky Aubrey]], the [[AnnoyingYoungerSibling mischievous Kel]], and the [[TeamDad brotherly Hero]], and from here they venture into the fantastical land of Headspace to have picnics with the [[TheCutie innocent]] NatureLover Basil and Omori's [[TeamMom loving sister]] Mari and go on adventures.

But one day, Basil goes missing, and Omori, Aubrey, Kel, and Hero set off to search through all of Headspace for him. As they navigate their way through a {{Space Pirate|s}}'s relationship issues, a mad duchess' narcissistic tyranny, the evil laboratory inside a whale, and [[UndergroundMonkey various types]] of [[KillerRabbit hostile bunnies]] ([[QuirkyWork among other things]]), a [[EldritchAbomination horrifying presence]] continues to rear its head, and it wants something from Omori.

Developed and launched on Website/{{Kickstarter}}, Omori takes heavy influence from other [=RPGs=], most notably ''VideoGame/{{EarthBound|1994}}'', as well as ''VideoGame/YumeNikki''. It was fully funded with several of its stretch goals met, including a full Japanese localization. The game was released on December 25, 2020 for PC systems, with Platform/NintendoSwitch, Platform/PlayStation4 and Platform/XboxOne versions released on June 17, 2022 with additional new content. Music by [[http://spaceboyfriend.bandcamp.com/ Space Boyfriend]], [[http://slimegirls.bandcamp.com/ Slime Girls]], Pedro Silva and Music/BoEn, with additional tracks by Creator/TobyFox, bansheebeat, James Roach, Lumena-tan, Madeleine Glenn, Omniboi, Samm Neiland, Shirpower, Music/{{Tofie}}, and Voia.

You can buy the game on Steam [[https://store.steampowered.com/app/1150690/OMORI/ here]].

In November 2023, [[https://twitter.com/OMORI_GAME/status/1727341175911198780 an official manga adaptation]] was announced and it will be serialized on Kodansha's Monthly Afternoon magazine by Nui Konoito.

See also ''VideoGame/{{Undertale}}'', ''VideoGame/{{Lisa}}'', ''VideoGame/JimmyAndThePulsatingMass'', and ''VideoGame/{{Annventure}}'', other ''[[VideoGame/EarthBound1994 EarthBound]]''-inspired [=RPGs=] with dark themes.
----
!!This game provides examples of:
[[foldercontrol]]

[[folder:Tropes # to G]]
* TheNineties: It is heavily implied that the game takes place at some point during the 90s, and there's a lot of evidence that suggest this: Pet Rocks still being a thing, just like Tamagotchi/Digimon virtual pets; Sunny's computer being based on Windows 95/98 alongside the Download Window boss, which on itself is based on the Internet Explorer's own download window; the presence of cassete tapes and boombox enemies in Headspace; Pluto's classification as a planet ([[PlutoIsExpendable Pluto was only denounced back in 2006]]); the incredibly tough Nokia 3310 as a Charm with a colossal Defense boost; one of the Black Space fissures having two VHS tapes containing Sunny's memories of himself and Basil, the list goes on.
** Still, in the real world when visiting Hobbeez, you'll find a shelf full of [=DVDs=], and even some Arcade machines that don't work anymore, an indication that the game could be actually taking place in the mid-00s. With the main gang now in their teens and Hero being a young adult, all the references could be because their childhood days transpired in the 90s.
** [[spoiler:In the Hikikomori route, after Hero inherits the Last Resort from Mr. Jawsum, his portrait appears in the hall alongside the previous owners, and interacting with it indicates "199X-". Assuming the events in Headspace are supposed to take place 4 years before present time, that would mean that the events in the real time take place sometime between 1994 and 2003.]]
* AbsurdlyHighLevelCap: Your level caps at 50, but you can finish the game at around level 30 to 35. [[spoiler:This is because at the two-thirds mark, the game drops its RPG elements and becomes almost pure story, making your levels irrelevant afterwards. If you do get on the Hikkikomori Route and reconstruct Headspace, you do get additional challenges that can mandate you to get stronger, but these are ultimately optional and you can conclude the story without any further fighting.]]
* AcceptableBreaksFromReality:
** Picnic baskets act as {{Save Point}}s in the Headspace dungeons, with Mari's picnic blanket serving as a TraumaInn and HintSystem. While the healing and hints don't follow into the real world, Sunny can still find picnic baskets to save with, because not being able to save anywhere in the real world would be needlessly frustrating.
** HyperactiveMetabolism is in effect in the Headspace, with eating food healing your party members, and you're able to eat as much of it as you want. While the real world has a lot of UnexpectedlyRealisticGameplay, this part is kept so that you can still heal your characters.
* ActionBomb:
** Interacting with a bookshelf in Grandma's house first makes Omori sneeze due to all the dust, and then causes an aggressive Dust Bunny to emerge. While he looks cute, he's actually capable of "exploding", which hurts both itself and the entire party for 20 damage (roughly half of their starting HP).
** Potted Plants like to blow up if they're low on health, but you can avoid this if you defeat them fast enough.
** The Snot Bubbles inside Humphrey's stomach have this as their entire game plan: they explode on death, and will spend every turn they have buffing themselves in preparation for that.
* AdamSmithHatesYourGuts: Once you start paying Rococo, his art commissions will get more and more expensive, to the point where he will charge you ''50,000 clams'' for the final commission, Justified as he puts more and more hard work into each new painting.[[note]]In total, you'll have to pay ''100,000 clams'' to fill out his gallery.[[/note]]
* AdaptationExpansion: The original webcomic was a short, single-panel series that only barely touched on Omori and his life. Basically all of the extensive lore, characters, world-building, and other stuff comes from the game.
* AdaptationalContextChange: "My Time" was written from the point of view of a person whose combined ennui and insomnia meant living day to day was difficult. [[spoiler:As the ending theme for the BadEnding, it becomes about Sunny's struggles and trauma leading him to think he'd be better off as "a voice inside [his] head" and that everything will stop if he closes his eyes to the world, whether that means completely living in his own mind or killing himself.]]
* AdultsAreUseless: In Headspace, this trope is zigzagged, since the adult figures tend to be the boss fights, but it is played straight in the real world. Sunny's mother is away from home all the time, leaving voicemails and instructions for her son. Any adult that Sunny encounters have their own problems. Kel's own parents favored Hero over him and have realized too late that Kel would treat them coldly for ignoring his problems, while the churchgoers, instead of helping Aubrey when her friends confront her during a sermon, proceed to gossip behind her back. [[spoiler:Tragically, if Sunny and Mari's parents had been at home the night of their duet recital, they likely would have stopped the inevitable sibling fight from escalating after Sunny broke his violin, and Mari most likely wouldn't have died.]]
* AllInARow: All of the party members follow Omori around at all times.
* AllJustADream:
** The entirety of Headspace.
** [[spoiler:After either clearing or losing in the [[BonusDungeon Recycultists' Lair]], you suddenly find Sunny outside, daydreaming while staring at the sky. Where the cult once stood is replaced with an empty patch of dirt.]]
** In the added content in the console versions, [[spoiler:during the extended Boss Rush, when Omori and Basil attack Mari, the situation is ''too'' close to the AwfulTruth and abruptly invokes Something in the Wind. Omori eventually wipes everyone's memories of the boss rush, although Basil and Mari have lingering feelings and the player still gets a Flower Crown for completing the event]].
* AllThereInTheManual: Hidden within the game's internal files is [[spoiler:a more detailed version of the Black Space's photo album with captions for each photo thoroughly explaining the events of that fateful day]].
* AlmightyJanitor: [[spoiler:You wouldn't expect the Pet Rocks champion to be the Othermart fishmonger, would you?]]
* AlternateUniverse: Some official artwork shows the friend group as teenagers [[spoiler:with Mari there]], which is most likely an alternative universe where [[spoiler:she didn’t die]].
* AmbiguousEnding:
** The good ending implies that [[spoiler:Sunny comes clean about what really happened to Mari, but it cuts off before we can see their reactions.]]
** The bad ending has [[spoiler:Omori leaving the Neighbor's Room right to the hospital balcony in the real world, turning into the bandaged Sunny as it happens. He promptly jumps off and [[IFellForHours falls forever]] as the credits roll and multiple dream-like backgrounds appear to go along with the eerie credits theme. There's a {{smash cut}} back to the title screen, but no floor in sight.]]
** A neutral ending has [[spoiler:Sunny leave Faraway Town without coming to terms with his past. When he walks into his mother's car, Something follows him in, implying that his guilt and denial will follow him for the rest of his life… however long that turns out to be.]]
* AmbiguousSituation: It's unclear if Sunny's parents have figured out a key plot point or not. [[spoiler:Specifically, what Sunny did to Mari, given the time period as well as the context clues in all the routes, and the police decided not to prosecute Sunny since he was punished enough given his HeroicBSOD and guilt for years on end. The photos during the "Truth" segment show the holes in Basil's spontaneous cover story, namely the bloodstains and fingerprint stains on Mari's shirt and that she apparently hung herself in her stockings but they weren't dirty with grass and mud from the backyard. We only know that her friends didn't question that it was a suicide, hinting they didn't actually see the body. Since Sunny is an UnreliableNarrator, the player doesn't know if his father really disowned him, or if his mother tearfully said that she couldn't lose him and her daughter as well. Those flashbacks could have been Sunny's guilty conscience as well. It also depends if the state in question would have ordered an autopsy on Mari's body per the law, or if Sunny's family would have gotten a religious exemption]].
* AnachronicOrder: [[spoiler:Once Sunny receives the photo album in Black Space, the player is tasked to collect photos that show the truth surrounding Mari's death. The player is aware that Mari apparently committed suicide by hanging herself on a tree at this point in the game, but once you start collecting the photos, they're all out of order, and as the dream section goes on, it becomes apparent that something else happened when Mari died. All to make [[NeverSuicide the reveal]] more shocking to the player.]]
* AndIMustScream: It's hinted but not outright stated that [[spoiler:when Omori resets Headspace and Black Space, that the friend group doesn't reset with him. He then puts the old copies away when he has no use for them and makes new ones. Some rooms in Black Space reveal multiple copies of his friends that have become corrupted. One room, in particular, shows them swimming in lava, accompanied by their faces frozen in stone. The faces still look ''conscious'']].
* AndTheAdventureContinues: [[spoiler:Deconstructed and ultimately subverted in both the bad ending and Hikikomori route. After Sunny disappears from his own mind, Omori exits White Space to meet his friends as they leave the Neighbor's Room for Headspace to embark on more adventures. However, this is far from a good thing. This represents Sunny refusing to face reality and choosing to continue to run away from his problems by further burying himself in Headspace. This decision ultimately costs him his life in the bad ending, as when the party exits the Neighbor's Room, it cuts back to the real world where Sunny jumps off the hospital balcony. Meanwhile, in the Hikkikomori route, after hitting the ResetButton, Omori gets free reign to explore all of Headspace and take on new challenges within, but it's all meaningless when the only way to properly end the story is by either going to sleep with the knife in the real world, which kills Sunny, or silently moving out of Faraway Town, leaving Basil to commit suicide offscreen if the ambulance sirens in the credits are any implication.]]
* AntagonistTitle: [[spoiler:Omori becomes the main antagonist during the final day, trying to take control and get Sunny to kill himself out of self-loathing and grief once Sunny confronts [[AwfulTruth the truth behind Something]] and stops running away from his problems.]]
* AntiEscapismAesop: The central message of the game. The game mostly takes place in Sunny's MentalWorld, Headspace, where mostly everything is happy. But in the real world, Sunny is a depressed {{hikikomori}} who uses Headspace as an escape from his depression. The best ending the game has to offer can only be obtained by actually going out of your house and reconnecting with your friends, so that everyone can face the AwfulTruth and overcome their inner turmoil together. Staying in all the way till Moving Day expands the amount of Headspace content you get, but it will all lead to [[spoiler:Omori [[SplitPersonalityTakeover taking over Sunny]], blinding himself from the AwfulTruth that he accidentally killed Mari, and not really solving anything while Basil kills himself]].
** [[spoiler:Bonus points for the phobia-based fights in the Lost Library, as even though Omori kills them and gains new skills, all he's doing is killing off ''all'' his bad memories of Mari, shown when the piano disappears in both the library and in reality (or rather, the piano becomes invisible due to Sunny/Omori [[SelectiveObliviousness refusing to acknowledge its existence]]), and you earning the achievement "[[RepressedMemories Repressed]]".]]
** And even then, [[spoiler:Something keeps following Sunny/Omori around even in the real world. Omori might have succeeded in repressing the traumatic memories involving Mari, but the guilt? The guilt will always remain. Sunny, assuming he doesn't kill himself with the knife, walks out of that house, gets into mom's car, to drive away from the friends he will likely never see again, and along with them goes the last hope of Sunny ever getting over his guilt]].
* AntiFrustrationFeatures:
** [[WeCannotGoOnWithoutYou The game ends when Omori's heart depletes]]. But unlike other party members, he gets to [[LastChanceHitPoint survive a lethal attack with one HP]], so long as he didn't end the previous turn there. [[spoiler:Cleverly inverted during the final battle, where Sunny cannot kill Omori because he keeps surviving Sunny's attacks ''because'' of this gameplay mechanic. Justified as Omori is the manifestation of Sunny's guilt and depression; he can't just make all of that go away by beating it up.]]
** Talking to Mari will keep track of any ongoing and finished sidequests in the Headspace.
** In segments that take place outside of Headspace, the game generally tries to do away with the more video game-y amenities of the system in favor of a more realistic approach. However, there's one major exception: there's still random unexplained picnic baskets everywhere, because getting rid of save points for large parts of the game would be annoying.
** Losing the Hangman Game will crash the game, but you'll be put right where the game crashed when you load the game again, meaning you won't lose any unsaved progress.
** Any time you have to fight one boss right after the other, the game will recover all your Heart and Juice between the fights. This applies against [[spoiler:Mr. Jawsum and Pluto (EXPANDED), as well as the Slime Girls and Humphrey]].
** The late-game version of Headspace has a lot of these. [[spoiler:Almost every area has footprints guiding Omori to the key required to enter the Red Door, preventing the player from getting lost. Collecting the key not only spawns some Red Hands to take Omori back to the Nexus, but also removes the door you last entered, avoiding even more confusion. Lastly, you don't need to experience every room — the Red Door appears after you've visited your eighth room in Black Space, no matter which eight rooms you went in.]]
** During the FinalBoss fight, using any of Sunny's healing moves will always ensure he acts before the boss does, so the player doesn't die a cheap death in the finale.
** The 1.0.3 update added three more save files into the game. This becomes very useful for those who want to finish certain sidequests, backtrack to some missed content or view all the endings.
** When Space Ex-Boyfriend gets Angry during his boss battle, the game flat-out tells you that you can’t make him Happy or Sad, which saves you from wasting a turn on what would be a fruitless attempt. The same happens with Sweetheart and the Unbread Twins.
** You'll have to put photographs back in Basil's photo album at a few points in the story. When this happens, the space that you need to place the photo in will pulse with a black outline so you aren't just blindly guessing.
* AntiVillain: For all intents and purposes, [[spoiler:Omori is this. He is completely honest that he's not a hero of the story, but rather the hero that Sunny wanted to be: a leader whose friends admire him, following without question. Omori also points out that Sunny created him to be this way, and that it was Sunny's choice to live in Headspace for years rather than face the fact that he had caused somebody's death]].
* ArcNumber: Doubling as ArcWords. 143, in which each number stands for the number of letters in "I love you", [[https://www.reddit.com/r/OMORI/comments/l6nry3/ive_found_a_recurring_number_across_omori_with_an/ subtly appears a few times]] as battle damage and in the internal code like the ID for the WTF value. This is usually related to Something and Mari. In fact, Something does say "[[spoiler:SUNNY]]… I love you…" at a certain point.
* ArcSymbol:
** Stairs, hands, watching eyes, and nooses. The appearance and focus on those foreshadow [[spoiler:the reveal Sunny accidentally pushed Mari down a flight of stairs and Basil hanged her corpse to make the incident look like a suicide, only to end up further traumatized by the glimpse of her open eye staring at them]].
** The commonly-seen light bulb, something typically used to represent the birth of an idea, dangling over White Space. [[spoiler:Or in this case, a black light bulb that gives off darkness instead, doing the reverse — ''repressing'' an idea. It symbolizes Sunny's RepressedMemories, and shines darker the more those memories resurface to symbolize his subconscious fighting against it. In the normal route, Sunny smashing the light bulb ends his repression and begins his final confrontation with Something.]]
* ArcVillain: Most areas in Headspace have one for each day, [[spoiler:and they all serve to distract Sunny from the truth]];
** Captain Spaceboy, or more precisely, Captain Space Ex-boyfriend for the Prologue.
** Sweetheart for Three Days Left.
** Mr. Jawsum for the first half of Two Days Left.
** [[spoiler:Humphrey for the other half of Two Days Left.]]
* ArcWords:
** "Welcome to White Space. You have been living here for as long as you can remember."
** "Waiting for something to happen?"
*** [[spoiler:"Welcome to Black Space."]]
** "Everything is going to be okay", and variations thereof. [[spoiler:The words were originally spoken by Basil to reassure Sunny while helping disguise his accidental murder of Mari as a suicide and represents their shared trauma and denial of the truth that created Something.]]
** "There is nothing here."
** [[spoiler:"It's a long way down… Do you want to jump?"]]
** More subtly, [[spoiler:"I'm sorry." and "I love you." or "143", all having relations to Mari or Something]].
** [[spoiler:In the Hikkikomori route, "It is not alive." becomes this]].
** Otherwise, there's "Don't forget — [[spoiler:it's in the toybox]]."
** "Will you forgive me? My best friend..." appears at the very start of the game, and then a few times later on [[spoiler:in Black Space, and on the Hikikomori Route]].
* ArtImitatesArt: Sweetheart's gallery features parodies of everything from "Art/{{Guernica}}" and "Art/{{The Birth of Venus|Botticelli}}" to Marcel Duchamp's "Fountain" — the latter of which contains [[RunningGag yet another piece of ramen.]] Furthermore, Last Resort features what is clearly a pastiche of "The Physical Impossibility of Death in the Mind of Someone Living," only fitting for a place run by an actual shark.
* ArtShift: Something-based creatures are Claymation-esque abominations that are intended to clash with the game's art style mentioned below.
* ArtStyleDissonance: Most of the game, despite its dark topics, is composed of colorful, pastel-drawn art.
* AscendedMeme: In the added content in the console ports, [[spoiler:Kel in his boss fight will use the famous Kel Nuke strategy (Coffee + Flex + Run N' Gun) to deal [[TheresNoKillLikeOverkill thousands of damage]]]].
* AvoidTheDreadedGRating: A likely unintentional example. The game was originally released on PC without an ESRB rating, but upon getting a console release on the Switch, it was rated M for 17 and up. Though the game's subject matter is rather dark, it's also likely it wouldn't have warranted more than a T rating if not for the single, randomized, instance of the word "fucking"; one of the Humphreys will randomly say "I fucking love air conditioning" rather than their normal line gushing about [=ACs=].
* AwesomeButImpractical: [[WhiteMage Hero]] has three skills that [[DrawAggro forces the enemies to target him]], but the build will fall flat when Hero starts trying to heal people. Although he gets an InfinityMinusOneSword upon finishing the Weeping Willow quest, none of his skills aside from [[BlazingInfernoHellfireSauce Spicy Food]] can put his now-large attack skill to use, and his utility as the ItemCaddy will be diminished since he'll swap out his Pan or Blender. [[spoiler:But on the Hikikomori route, you can find the Tenderizer, which grants him an attack that not only deals massive damage but also decreases his foes' defense, allowing him to dish out some serious damage.]]
* AwfulTruth: The source behind everything bad that happened [[spoiler:was Sunny accidentally killing his sister Mari before their recital, and the only witness to this crime, Basil, came up with the idea to hang her corpse to make it look like a suicide. This incident traumatized Sunny and Basil, created the Something that haunts Sunny and Basil, Omori, who would repress the incident and Something in Sunny's dreams, and shattered the friend group while Basil's sanity deteriorated]].
* BackingAwaySlowly: If you choose to [[spoiler:save Basil, Sunny ''tries'' to do this when seeing that Basil is having a breakdown. It's not the player doing it. Unfortunately, taking the sensible action only makes Basil's reaction worse]].
* BareMidriffsAreFeminine: Aubrey's outfit seen in the real-world segments has a black crop top.
* BarefootSuicide: A variant; [[spoiler:Mari]] was wearing stockings when [[spoiler:her body was found hanging]]. In the same segment where the player sees this, however, [[spoiler:the stockings are pristine rather than stained from the grass and mud around the tree with the noose. Because Mari didn't hang herself; she was inside and upstairs when Sunny knocked her down in a fit of anger]].
* BadPeopleAbuseAnimals: While we already get a hint that things are wrong in [[spoiler:Black Space, the {{Foreshadowing}} that Omori is not the hero of the story is that one room involves cutting open his beloved cat, Mewo, who is StrappedToAnOperatingTable and terrified. What's worse is that most players assume it is necessary to continue the story when it isn't; Omori has to stab himself to exit the room, but most players only figure it out after dissecting Mewo. Sounds bad? It gets worse when you learn that Omori is the ruler of Black Space and created it as a prison for Basil. While there is a reason why Omori keeps murdering Basil, if not one that justifies his actions, the cat is a completely innocent party]].
* BalanceBuff: Despite Kel's role as the game's FragileSpeedster, he was considered too fragile because of how low his HP is compared to the rest of the group. The 1.0.2. update fixed this by increasing his HP by 4 every time he gains a level.
* TheBattleDidntCount: Every fight that takes place in the real world will progress the story the same way, whether you win or lose. For example, during the first fight with real-world Aubrey, you're expected to end the fight in a single attack because Sunny is wielding an actual knife as his weapon. But if you refuse to let Sunny attack, the fight will instead end with Aubrey finally noticing the knife Sunny is holding and nervously backing off.
* BattleInTheCenterOfTheMind: [[spoiler:The final confrontation in White Space between Sunny and his alter-ego born of overwhelming grief and trauma, Omori.]]
* BearsAreBadNews: Rare Bears are devastating {{Lightning Bruiser}}s that can heavily damage (or even one-shot) a party member due to special modifiers that apply while they're Angry. They even move frighteningly fast in the overworld and can close the distance easily when you draw their attention. They lose a lot of bite, though, when pacified with a different emotion or even when forced to Neutral. A certain corner of Sweetheart's Dungeon is home to a large collection of Rare Bears, all guarding some valuable loot… if you can fight your way out first.
* BeigeProse: In the [[spoiler:Black Space treehouse]], interacting with the objects there merely results in a piece of monologue about the item that's only one word long, in AllLowercaseLetters, and with NoPunctuationPeriod.
* BeyondRedemption: [[spoiler:Omori is Sunny's very belief that he is this because he accidentally killed Mari and lied to everyone about how she really died. On the surface it does look bad: from what the photos and datamining reveal, Sunny pushed Mari down a flight of stairs while arguing with her, though it's confirmed Sunny never meant to hurt her. Rather than get the neighbors for help or dial 911, Basil helped stage Mari's death as a suicide when it was too late to administer medical attention and potentially save her. Omori tells Sunny while literally cutting him up that he hurt the people who loved him, and he can never undo the damage he caused, especially to Mari. Ultimately, it's the player's choices that determine if Sunny agrees with Omori that what he did makes him a monster who should kill himself.]]
* BigBadEnsemble: [[spoiler:"Something", a black one-eyed creature that's constantly haunting Omori throughout the game, is the force that kidnapped Basil. Omori is just as important of a cause of the real friend group's separation, and both he and Something embody the guilt that Sunny feels for accidentally killing Mari.]]
* BigFancyCastle: Sweetheart's Castle is the mad doughnut duchess's show-offy dwelling.
* BittersweetEnding: [[spoiler:The good ending has Sunny finally coming to terms with Omori, his darker self, and regains the ability to express his emotions, and it concludes with the implication that Sunny comes clean about the truth behind Mari's death, which is likely to shatter the entire friend group once more, though the player isn't shown the group's reaction, leaving it ambiguous as to how learning the truth affected everyone. Furthermore, Sunny has a likely permanent reminder of the whole mess: the eye damage from when he tried to stop Basil's suicide. However, Sunny and Basil no longer have to live with the guilt of the secret anymore, and the secret ending hints that Something is gone, representing that they are ready to move on.]]
* BlankWhiteVoid: The game begins with Omori in a tiny "room" that only contains his sketchbook, laptop, and a tissue box "for wiping your sorrows away", and is somehow "illuminated" by a black light bulb. You can walk straight through its walls, but the outside is simply a large expanse of pure white void, its only inhabitants being a perfectly normal black cat that doesn't do anything, and nameless spermatozoa-looking things that instantly send him back to his room.
* BlackBugRoom: [[spoiler:White Space is this for Sunny. Black Space is even worse in this regard, especially during the Hikkikomori Route when Black Space '''2''' is unlocked. [[GuideDangIt And if you can find it]], there's also Red Space, which is hidden within Black Space 2, and can only be accessed (outside of cutscenes and scripted events) on the good route during the final day.]]
* BlockPuzzle: [[spoiler:As you ascend Snowglobe Mountain, you have to navigate across slippery ice to reach the ladder on the other side. They're all pretty simple so you won't break a sweat, and the introduction of presents as movable stoppers sets up expectations of a complex puzzle near the end. Surely, the last cave has a large frozen section dotted with ''lots'' of presents… but it's all subverted when you have only one route to cross without any shuffling around.]]
* BloodlessCarnage:
** The damage inflicted on the enemies in the game's fights never shows any outward damage. Also, when Omori stabs himself, he simply curls in on himself and falls to the ground.
** Subverted in one of the endings where [[spoiler:Omori takes over Sunny and stabs himself with the knife]].
** Some events in [[spoiler:Black Space]] also subvert this by having [[spoiler:Basil]] getting killed over and over in rather gruesome ways, such as getting his body stuck between an elevator's door. The door is left smeared in blood as he slides into the floor. Then there's another where Omori rips his head off while they're both riding a raft, with Omori leaving bloody footprints afterwards.
** Another subversion is [[spoiler:the photos showing how Mari really died]]. It turns out that [[spoiler:blood got on her clothes, smeared further by Sunny dragging her to bed in a desperate attempt to wake her up]].
** Fully averted in the fights against [[spoiler:Aubrey the first time]] and [[spoiler:Basil]], the latter being the very rare example of such graphic damage being shown in amazing detail [[spoiler:towards the protagonist]] in real-time and after the fight.
* BloodstainedGlassWindows: When Sunny and Kel find Aubrey at church during a sermon, she causes a scene and fights them on the spot, illiciting gossip from the churchgoers during the fight and after it when she leaves.
* BlownUpwardByABlowhole: After beating the boss in [[WombLevel Humphrey the Whale]], the party is expelled outside Humphrey's body through his blowhole.
* BonusDungeon:
** On the main route, Orange Oasis is a completely optional location filled with sidequests.
** Snowglobe Mountain, available on the Hikikomori route. It's unlocked after you accept a sidequest to find the now-missing Capt. Spaceboy.
** The Abyss, which can only be accessed on the Hikkikomori route, and needs all 26 keys to access.
** [[spoiler:Black Space 2 is accessible on the Hikkikomori route after conquering all three phobia Somethings in the Lost Library.]]
** [[spoiler:The Recycultists' Lair, which is the only dungeon that takes place in the real world.]]
* {{Bookends}}:
** [[spoiler:You meet Omori in White Space at the beginning of the game. Before either of the main endings, Sunny fights Omori in White Space.]]
** [[spoiler:The bad ending shows the "Welcome to White Space" cutscene again before having Omori exit White Space to join his friends on another adventure in Headspace, just like how the game begins. [[SubvertedTrope Then it cuts back to the real world as Sunny]] [[DrivenToSuicide throws himself off the hospital balcony.]]]]
** [[spoiler:The very first time White Space is seen at the very beginning of the game past the opening scene, a particular ringing tone plays which is similar to the one that plays before anything creepy happens, but this one is a far lower-pitched sound. This particular tone is only played in two places in the game: At the very beginning, and at the end of the Hikikomori Route when Omori hauls Basil out of Black Space and resets Headspace. The tone at the beginning of the game was [[StableTimeLoop Headspace resetting from the previous cycle]], but there's no way for the first-time player to know that.]]
* BorderOccupyingDecorations: The game has a dynamic border that changes depending on the level, as the game was originally displayed in 4:3. It even updates itself to reflect plot points, such as the Headspace border depicting constellations of the cast replacing one of them with a flower after [[spoiler:the other party members are made to forget Basil]].
* BoringButPractical: A lot of skills and items the party will receive later on in the game will make them competent in branching out to other builds, but the early skills are still quite good when used correctly:
** Sad Poem, Annoy, and Pep Talk are very cheap ways to manipulate the emotions of anyone, friend or foe. It'll take a bit before you can access a steady supply of emotion-manipulating items.
** Omori's Bread Slice generates Bread when it scores a kill, giving you handy access to a good supply of healing items as you time it right. Bread heals for 60 HP when used, which can cover you for most of the early game and reduces the amount of times you use up Hero's Juice.
** Aubrey does have benefits from turning herself and/or her enemies/friends Happy, but an Angry Headbutt is still one of the strongest moves the player has access to for much of the early-game.
*** Or, one could take advantage of Aubrey's high HP and good Defense, and the fact she's one of the only two people in your group (the other being Hero, the guy you ''don't'' want getting hit and/or don't want to be wasting turns with as he's your main healer) who can cause an enemy to focus on her. Make Aubrey Sad (as long as the enemy isn't angry!) and have her spam Counter while Hero cooks for her. Boring, but it's very hard to lose unless the enemy spams attacks that hit the entire group.
** Stab remains useful even in late game because Stab is not only a guaranteed CriticalHit, but will [[ArmorPiercingAttack ignore Defense]] if Omori is Sad as well, which adds the advantage of increasing Omori's own Defense. It's a safe and reliable method of dealing damage that doesn't cost much Juice.
** Kel's Flex ability is effectively the only skill that makes a damage-based Kel build usable, as it nullifies the penalties of happiness (an emotion Kel can get a lot out of thanks to Run n' Gun) and makes his next attack deal much more damage, allowing him to deal high numbers for comparatively low Juice.
* BossCorridor: [[spoiler:The segment before the FinalBoss is a very long bridge where Sunny must recall most of his happiest memories, ending on a practice hall where both versions of his friends encourage him to move on. The cutscene with the violin is followed by the fight.]]
* BossInMookClothing: Basically '''everything''' in Dino's Dig. You can access the place fresh off having beaten Sweetheart on Three Days Left, and judging by the power (or lack thereof) of the enemies outside, you have no real reason to expect anything different from the ones in Dino's Dig… until you realize they're dishing out {{One Hit KO}}s to your party members left and right or at best leaving them on the brink of death. And that's just the enemies on the '''first''' floor. The ones on the higher floors, especially the [[ArtShift Rabbit?]] enemies on floor 3, can pose a serious threat to a level 40+ party, making them some of the absolute deadliest regular enemies in the entire game.
* BossRush: After certain events [[spoiler:in the Hikikomori Route]], a Boss Rush is unlocked inside [[spoiler:Humphrey]]. Here, the player must fight against stronger versions of previously fought mandatory bosses all at once[[note]]Ye Old Sprout, Download Window, Space Ex-Boyfriend, King Crawler, [[WolfpackBoss the whole Sir Maximus bloodline at once]], Sweetheart, Mr. Jawsum, Pluto (Expanded), the Slime Girls, and [[spoiler:[[FinalBoss Humphrey]]]][[/note]] with no healing in-between, forcing you to rely on recovery items and Hero's cooking for the rest of the fights.
* {{Bowdlerise}}: In the original comics, Omori spends time looking at porn on his laptop, and is even shown [[TroublingUnchildlikeBehavior getting drunk off alcohol at one point]]. In the game and in official art, the contents of the laptop's screen are censored by static, and only show a wallpaper of a brick wall when interacted with. (Omori still keeps a box of tissues around, though their description now implies they are used entirely for wiping away tears, instead of masturbating.) Omori's taste for alcohol is also phased out of the game completely.
* BreadEggsMilkSquick: The audience of ''Sweetheart's Quest for Hearts'' mostly have the same dialogue, but a handful of them have unique lines when spoken to, mostly to do with the show. But rather than speak to one of them, in the back row, the leader will observe that "It is not alive."
* BrickJoke:
** The Elder Sprout tutorial boss is referenced at the start of Sweetheart's show… as a [[BlackComedy sudden, jarring memorial to him]].
** One of the reasons why Kel misses Basil is that he needs Basil to remind him to wash his hands. In the Last Resort, he goes to the restroom and the game goes out of its way to mention that he didn't wash his hands.
** One of the first things you do in Faraway Town is purchase a cookbook for Hero. Kel doesn't have the $20 on hand, so you have to pay out of your pocket. [[spoiler:The next day, when he leads you into his room, you find $20 in his closet and can just pocket it to clear his debt to you.]]
** In Pyrefly Forest, when Hero is afraid of spiders, Kel says that Basil would surely have had something to say about spider actually helping with his gardening to calm Hero down. [[spoiler:In one Black Space room, Basil actually comments on how spiders help his plants by eating pests… before he's then eaten by them.]]
* BrokenBridge: Omori's fears act as this. Because he has a fear of heights, spiders, and water, whenever he approaches anything that can trigger this, black shadows will appear, preventing him from going any further. The shadows disappear once Sunny confronts and overcomes each of the phobia Somethings in the real world segments.
* ButThouMust:
** Lots of this in the game's many scripted fights (usually against Something, and almost always in the game's Faraway segments). The Run command is almost always unavailable, and sometimes even the Fight command isn't available either, and abilities appear and disappear in your Skills menu when they are needed. Most notably, in the fights against [[spoiler:Basil]] and Something [[spoiler:after you break the lightbulb]].
** This trope subverts itself with certain decisions you can make. For instance, in the first morning, if you choose not to answer Kel knocking on your front door, you still retain control but he'll keep knocking, and you can try to answer the door again. Thoroughly ignore the knocking and go back to sleep, though, and an entirely different sequence of events will unfold for the rest of the playthrough.
* ButYouWereThereAndYouAndYou: All of the party members and most of the [=NPCs=] in Headspace are based on people from Faraway Town, or else characters from in-setting fiction.
* CallAHitPointASmeerp: The game's equivalent to mana/stamina is called Juice.
* CasinoPark: The Last Resort is a casino region in the depths of Headspace's ocean.
* CatharticCrying:
** [[spoiler:After years of suppressing his emotions and repressing the truth of what happened to Mari, Sunny wakes up crying after defeating Omori.]]
** A more {{downplayed|Trope}} example prior: [[spoiler:When Sunny plays the violin again, as soon as he's done with his song, he falls to the floor crying. However, this takes place in his dreams, and the aforementioned example is more cathartic because it's probably the first time he's let himself cry and feel his grief over Mari's death for real in years.]]
* CensoredForComedy:
** When [[spoiler:Sweetheart and Space Boyfriend]] kiss, there is a small censor bar that shows up over their lips.
** If you [[LethalChef botch the cooking minigame]], the end result will be pixellated.
* CentralTheme: Accepting past trauma and moving on from it.
** [[spoiler:In contrast, the Hikikomori Route is about self-destruction via denial.]]
* CerebusCallback: In the tutorial section, Aubrey and Kel knock over Basil by accident when he tries to break up their fight. They both apologize and help him to his feet. In the real world, Aubrey lashes out at [[spoiler:Basil at the park lake, pushing him into the water. She forgot that he couldn't swim and stares in horror as Kel shouts at Sunny to save Basil. If not for Hero's timely intervention, both Sunny and Basil would have drowned thanks to Aubrey's fit of rage]].
* CerebusSyndrome:
** [[spoiler:Once Black Space is unlocked, the story takes a turn for the worse. The creepy elements that were in the background are put into the spotlight, with the reveal that the source of Sunny's problems stem from him accidentally killing his sister Mari, and Basil helped him cover it up as a suicide to escape responsibility. You also lose access to the silly and colorful Headspace, as Sunny has to deal with problems in the real world and can't hide from the truth anymore. Then, after everyone else comes together for a sleepover before Sunny leaves, in the middle of the night, Basil [[PleaseDontLeaveMe begins to go insane]], and when Sunny goes to help him, the shared guilt causes the two of them to beat each other up so badly that they're left hospitalized; [[FromBadToWorse and then Omori decides]] [[SplitPersonalityTakeover to try and take control]] from a weakened and despairing Sunny to make him commit suicide.]]
** [[spoiler:The Hikikomori Route is darker and more depressing than the Main Route, to the point where Black Space becomes something closer to ''VideoGame/DotFlow'' in terms of tone and atmosphere. By the end, Sunny chooses to have Omori [[DeathOfPersonality take over completely]] rather than confront the awful thing that he did. The ending has Omori either commit suicide or quietly move out of Faraway Town while Basil kills himself offscreen.]]
* CharacterDevelopment: The only way to get a happy ending in the game is to enforce this on Sunny and the others. Otherwise, you get a mix of bad and neutral endings depending on your choices:
** Sunny has to confront that [[spoiler:he killed Mari by accident, and that living in denial of the truth, with his guilt, has done more collective harm than good. What's more, the first way to make amends for the damage is to reach out to Basil, the only other person who knew what really happened that day. To do so, you as the player have to make the choice to talk to Basil the last night before Sunny moves away]].
** There is also TheReveal that [[spoiler:Omori isn't real. He's an unhealthy defense mechanism that allows Sunny to hide from the guilt. Sunny can't defeat him in a straight battle because Omori is a part of him, and correct that Sunny played a part in his sister's death. The only way to "win" is to accept that Omori is right about something, but to promise to persist regardless. This allows Omori to retreat gracefully, drop his knife, and allow Sunny to regain control of his mind]].
** Meanwhile, Hero has apparently regressed from the CoolBigBro he used to be [[spoiler:following Mari's death]]. After a long stint in college, he starts redeeming himself by rescuing Basil and Sunny from drowning.
* ChekhovsGun: In the beginning of the game, right before Basil disappears, he sees a photo that appears to remind him of something grave, only managing to say, "Mari... she's..." [[spoiler:Right after, there's a split-second scene of a photo depicting a broken violin, which was involved in the events leading to Mari's death.]] This photo would later appear in full detail and context near the end of the game.
* ChromaticRockPaperScissors: Emotion-based combat buffs follow a coloured rock-paper-scissors theme: Happy (yellow) beats angry (red) beats sad (blue) beats happy.
* ColorMotif: The color purple is used for fantastic dreams, given that the kids have purple hair and skin, and the sky for Headspace. [[spoiler:Black is used to symbolize fear, like Something and Omori, while red is used to symbolize self-loathing and suppression, such as the Red Hands and Omori's final form.]]
* CombinationAttack: The game allows each character to perform these through activating "follow-up" prompts after a successful attack. However, doing so consumes "energy" (as opposed to "juice", which is only used for the normal skills).
* CompanionCube:
** The first time you talk to Kel in the demo, he shows Omori the pet rock he found the other day, and says he plans to call him Kevin. He remains in his inventory in the "Charm" slot.
** In the full game, he becomes distraught when he loses his pet rock Hector while climbing the ladder to Otherworld, and a sidequest involves searching for him. [[spoiler:Subverted in that (at least within the context of Headspace) Hector [[RealAfterAll is not only capable of speech, but was able to start a family of other pet rocks.]]]]
* ControllableHelplessness: [[spoiler:The end of the Sunny vs. Omori boss fight. In his second-to-last phase, Omori's attacks will start inflicting Afraid to disable most of your skills, but it can be removed with Calm Down. Near the end of his fifth phase, however, he will disable your Calm Down as well; the skill is still usable, but has no effect and only wastes Sunny's turn, completely locking you out of all your skills and ways to heal. If pushed to his final phase, Omori drops all pretense and will ''repeatedly'' use a heavy-hitting attack that inflicts Afraid and lowers your Defense, just to be on the safe side.]]
* CoolChair:
** The ominous "Throne of Hands" atop a long staircase. [[spoiler:Omori sits upon it after killing Headspace Basil and being unable to hide the truth behind Mari's death any longer, marking the point he becomes willing to pressure Sunny into suicide for his misdeeds.]]
** If Omori gains ownership over Sweetheart's Castle, [[https://youtu.be/cFIWrgBdzCA it turns into a room]] with an armchair and a bunch of framed family pictures on the back wall. Sitting upon the armchair causes Omori to enjoy the nice quiet day in peace for several minutes until the screen fades out again. By that point, the player knows what this act represents is far from a good thing.
* TheCoronerDothProtestTooMuch: [[spoiler:Mari’s death was very clearly set up to look like a suicide. The hanged body had blood stains on it, as well as grass stains from being dragged through the mud, and she wasn't going through any mental problems to explain her commiting suicide.]]
* CosmeticAward: There's a ton of sidequests in Faraway Town, but since that part of the game is almost entirely story-driven, most of the rewards you get from them are pointless beyond achievement hunting [[spoiler:and the quest givers sending you flowers at the end of the game]]. The lone exceptions are the gold watch you get from helping the smelly man and the seashell necklace, which is the only item in that section to actually give you stat boosts. [[spoiler:It helps a lot in the [[BonusDungeon Recycultist Lair]], the only part of Faraway where you get into non-scripted fights.]]
* CouldHaveAvoidedThisPlot: PlayedForDrama. On the Main Route, real Aubrey admits the reason why she was a jerk to Basil: [[spoiler:when asking to see his photo album of happier times, she saw that he had removed or blacked out any photos with Mari. Rather than ask him why he did that, Aubrey took it to mean that Basil was trying to erase any memories of Mari. She then stole his photo albums and took the remaining photos of Mari, to tape to her wall. In the present, Aubrey cries TearsOfRemorse and says that she should have just talked to Basil. Worse, Basil reveals to Sunny that ''he'' didn't erase the photos and mess with the album; Sunny did that while Omori was possessing him]].
* {{Creepypasta}}: Literally. There's an actual enemy in the game known as "Creepypasta", which is a small Rigatoni pasta tube that constantly morphs into a warped and creepy version of itself. Made it even more funnier when you read its description on the Foe Facts, which is the typical intro of a creepypasta.
--> Let me start off by saying that everything you're about to hear is 100% true. There was a garage sale last summer. I spotted a dusty cartridge of a game I never heard of before. I bought it, but when I got home, it didn't work. When I went back to the garage sale, the house was burnt down. :O
* CriticalHit: All combatants have a chance of landing one, and the game returns the message "It hit right in the heart!" when it happens. Being "Happy" raises this chance at the expense of overall accuracy. Omori's "Stab" skill outright guarantees a critical hit, but it costs a whole 10 Juice (half his starting amount) to compensate.
* CruelAndUnusualDeath: You can make a drinking game out of how many times this happens to [[spoiler:Basil in Black Space]]:
** The watermelon room: [[spoiler:Basil has been waiting for Omori to find him, tending watermelons. To find the key, you need to split open watermelons after the room briefly blacks out. Do this six times; the seventh time, Basil splits into chunks. Only then do you find the key in the next melon]].
** The spider room: [[spoiler:just as you find him trapped in a web, tiny spiders swarm Basil. He tries to stay calm, but [[DevouredByTheHorde they eat him alive]] as he starts to scream]].
** The treehouse room: [[spoiler:Basil has been waiting in the treehouse. He suggests, in GenreBlind mode, that they use the elevator that mysteriously appeared to return home. The elevator dings, letting you out in the treehouse, meaning you never left. As Basil tries to leave, the door closes on him and beheads him, before going down. He's still conscious and begging for help]].
** The river raft: [[spoiler:Omori and Basil take a raft on a river to get out of the room. Basil asks Omori if they could talk, just as they enter a dark tunnel. The raft emerges, and Basil has lost his head]].
** The playground: as [[spoiler:Omori and Basil explore, they see the friend group. Something is wrong, however… Hero blows his whistle, while Aubrey and Kel proceed to beat Basil to death. You look at the kids; each one endlessly repeats their very first lines of dialogue from the beginning of the game, and their faces are distorted by extreme color saturation]].
** Finally, the throne room: [[spoiler:Basil talks to Omori in the shadows of Sunny's house. Hands grab him through the balcony, and pin him down. Omori looks at a pleading Basil, stabs him, and walks over his body]].
* CrueltyIsTheOnlyOption: [[spoiler:There is a Sprout Mole excited about being close to leaving the dungeon, but the Sprout Mole is blocking the same button that would lead to the Sprout Mole's (and the party's) freedom. However, you cannot have the Sprout Mole press the button or convince the Sprout Mole to join you out of the dungeon. The only way to get rid of the Sprout Mole is by pressing another button… which makes the Sprout Mole explode.]]
* DarkerAndEdgier: Than Omocat's previous works -- more specifically, her webcomics, like ''Pretty Boy'' and her old ''Franchise/TheLegendOfZelda'' fan comics. While her old work is far more reliant on lighthearted humor, ''Omori'' has themes of suicide, death, depression, anxiety, and self-isolation. As the game progresses, the tone gets gradually worse and worse. And that's not even mentioning the [[spoiler:Hikkikomori Route]].
* DarkReprise: The game uses quite a few of these. "WHITE SPACE", "By Your Side", and "A House for Flowers" (Mari and Basil's leitmotifs respectively) in particular come in a lot of increasingly sad or eerie variants.
** "Lost at a Sleepover", the Neighbour's Room theme, has two of them: the horribly distorted "Friends." [[spoiler:that plays in Black Space's corrupted version]] and the melancholic theme [[spoiler:of its real world counterpart, "Treehouse — Here We Are, Together Again"]].
*** It also gets a menacing reprise in minor key in the bad ending.
** "Good for Health, Bad for Imagination" is the groovy song associated with the medicine aisle of the Faraway Mart. It later comes back as the somber "Clean Slate" [[spoiler:when Sunny wakes up in the hospital]].
** "You Cannot Go Back", the boss theme of [[spoiler:Space Ex-Husband]], on top of obviously calling back to his previous theme, also features [[spoiler:an off-key version of his special mixtape, because he's still completely broken over Sweetheart leaving him]].
** "Bad Morning", [[spoiler:the song that plays at the climax of Black Space]] is a creepy reinterpretation of "Good Morning", the ''end credits theme'' — meaning that the reprise will technically show up several hours before the original.
* DeadHandShot: [[spoiler:The Truth sequence has a photo that shows Mari's limp hand, while Sunny is in a TroubledFetalPosition next to her. He put her to bed, hoping she would wake up. This photo confirms she truly died in the narrow window between him pushing her down the stairs and tucking her in.]]
* DeathMountain: [[spoiler:The Hikikomori Route-exclusive Snowglobe Mountain is a tall, snowy peak.]]
* DeliberatelyMonochrome: The game's title screen is a black-and-white pencil drawing of the titular character. The environment in the opening scene is also completely black-and-white. However, other elements are exempt from this, as looking in the sketchbook shows plenty of red in the disturbing drawings, the MookBouncer creatures are pinkish in color, and the menu elements use a pink hand as a pointer, while health/juice bars are red and aqua. Then, the rest of the game goes straight to bright colors.
* DevelopersForesight:
** When Kel loses Hector on the way to the Otherworld, if the player climbs back down the ladder to check if Hector is at the bottom, all there will be is "a regular rock" at the bottom, which is likely Hector except turned over so that his face is not visible so the party doesn't recognize him, preventing the quest from being completed too early. Though it is not known why Omori doesn't just pick up the rock and check it to make sure it isn't Hector.
** During one of the game's more stressful sections, one of the required Hangman keys is easily missed. Fortunately, it can still be retrieved after the fact. [[spoiler:The key in question is the T key, which is found during a chase sequence in Humphrey. Since Humphrey becomes inaccessible after clearing it, then when the W key is awarded for clearing the area, the T key will pop out along with it if it was missed.]]
** At one point, Hero requests that the party get some flowers as a gift. If they already have flowers on hand, he'll acknowledge it but will still insist they go and buy some, since he prefers a fresh bouquet.
** The Slime Girls tell the party that they have to pay off Sweetheart's debt of 1,000,000 clams, to which Aubrey will exclaim that they don't have that much money. If the player [[https://youtu.be/-eblFHT38Wo actually accumulates 1 million clams]] by that point, Aubrey instead exclaims that they can't ''just'' hand over that much money, and the Slime Girls attack anyway.
** If the player enters a washroom while Omori is using the [[GenderFlip Mystery Potion]], the genderbent Omori will enter the girls' bathroom instead. Also, if the party looks into a mirror, the potion will wear off before transitioning to Omori's [=POV=].
** In the Hikkikomori route: [[spoiler:One of Abbi's tentacles appears in Sweetheart's Castle. If the player erases Sweetheart's Castle and then confronts Abbi, she will be short a tentacle. (Not a flawless foresight, however, as Abbi still ''says'' she has "eight" tentacles on the surface even if the castle is gone.)]]
** Everyone in the [[spoiler:real world segment, including your party and your opponents, can be affected by the emotion system and have different sprites for it despite the fact that you have no access to emotion-manipulating skills in the real world]].
** While there is a picnic basket in Black Space, you can't open the menu to quit. But it still works, and if you close the game any other way, you get a unique title screen upon startup.
** You can leave Sunny's house on the first day but lock yourself back on the Hikikomori route by not leaving on the 2nd day. If you check the photo album, [[spoiler:Sunny will have vandalized it, much like he did in the backstory]].
** During your first fight with Aubrey in the real world, Sunny can attack her with his knife, which brings about an immediate end to the battle as the Hooligans call you out and Kel confiscates the knife. If you have Sunny avoid attacking and run down Aubrey’s Heart normally, Kel will notice the knife after she flees and confiscate it anyway.
* DevelopersRoom: Or rather, [[spoiler:a developer's ''graveyard'' hidden in Black Space]].
* DieChairDie: Anyone can break open watermelons to get the goodies inside. Omori's knife can cut down weeds and traffic cones, while Aubrey can smash down sturdier obstacles like barrels and crates, some of which can yield useful items.
* DiesWideOpen: [[spoiler:Mari appears to die with [[DiesWideShut closed eyes]] after she's pushed down the stairs, as Sunny spends some time thinking she's just asleep. But after Basil leaves her hanged on a tree, he and Sunny glance back at her corpse and notice her open right eye glaring at them — as if [[SurprisinglyRealisticOutcome rigor mortis opened her eyes after the fact]]. This traumatic sight shapes the "Something" creature that haunts the two ever since.]]
* DiscOneFinalDungeon: Insides of Humphrey the Whale. It's located at the very end of the Deep Well area, which is the last major area in the map. [[spoiler:It also marks the end of the Headspace adventure. In the main route, the game from this point on drops the RPG elements and becomes almost all story. Meanwhile, in the Hikikomori route, Omori resets Headspace.]]
* DisguisedHorrorStory: Played with. The game is advertised as PsychologicalHorror in its trailers, but the Main Route is just as much of a RealisticFiction ComingOfAgeStory. However, the game's horror elements do persist in much of Faraway, blending the surrealism into the mundanity in a way that makes it more unnerving.
* DistressedDude:
** Basil, whom the gang's entire quest centers around searching for when he disappears under mysterious circumstances. [[spoiler:It turns out that he was banished into Black Space by Omori for [[HeKnowsTooMuch realizing the truth behind Mari's death.]]]]
** Faraway Basil also fits this trope, who is tormented by Aubrey and the Hooligans as well as his own Something, and starts going insane upon realizing that Sunny is moving away in a few days. [[spoiler:Part of the climax of the true route involves rescuing Basil from his inner demons before he kills himself.]]
* DoNotDropYourWeapon: [[spoiler:Depending on your choice in the Normal Route's final battle, when Sunny and Omori hug each other, the character that will [[SplitPersonalityTakeover fade out]] is given away by them letting their weapon fall (respectively, violin or knife).]]
* DoesThisRemindYouOfAnything: White Space has Omori, the dream self of a late teenager, alone in a room with tissues (to dry his tears) and a laptop (to surf the web). The implication is more heavily alluded to in [[Webcomic/{{Omoriboy}} the comic that the game is based on]].
* DoorToBefore: [[spoiler:Headspace loops on itself, with the Something mural at the bottom of the Deeper Well hiding a secret passage that connects directly to the cupboard in the Neighbour's Room. It saves a lot of backtracking, especially because at that point, your next (and final) destination is Basil's house, right at the beginning of the game.]]
* DoubleKnockout: PlayedForDrama in One Day Left when [[spoiler:Sunny enters Basil's room to try to talk him out of committing suicide, but Basil assaults him, believing he's helping Sunny by attacking his Something, forcing Sunny to defend himself. After a brutal beatdown of one another, they both fall unconscious and are hospitalized]].
* DoubleStandardAbuseFemaleOnMale:
** Headspace Aubrey routinely hits Kel for irritating her, which nobody — not even Kel's brother Hero or Kel himself — calls her out on. [[spoiler:In the Recycultist Base, which seems to happen in the real world at first but is actually a product of Sunny daydreaming, the tag image for Aubrey to Kel has her giving him an OffhandBackhand.]]
*** [[AvertedTrope Averted]] with real-world Aubrey's bullying of Basil, which is realistically portrayed as harmful and drives much of the conflict between her and Kel.
* DramaticChoirNumber: [=PerfectHeart=]'s battle theme "Tee-Hee Time" starts with a choir before moving to a childish giggling that transitions the song into a high energy track that wouldn't be out of place in a RhythmGame.
* DreamLand: Sunny's Headspace is a world constructed and explored in his dreams.
* DrivenToSuicide
** [[spoiler:The fate of Mari, or at least how it's initially set up. [[NeverSuicide What actually happened]] was that Sunny accidentally pushed Mari down the stairs in the middle of a heated argument, killing her. Basil, who witnessed the incident, helped Sunny frame it as a suicide.]]
** [[spoiler:If you don't get the good ending, the story ends with Sunny and/or Basil killing themselves out of grief for the above.]]
* DrivingQuestion:
** What happened to Mari in the real world to split up the original friendship group? The answer seems to be clear on Three Days Left — [[spoiler:Aubrey says none-too-tactfully that Mari died a few years ago]] — but it gets more complicated as the story progresses.
** Can you ever move past the worst mistakes of your life and grow as a person? In tandem to that, do you deserve to be forgiven? [[spoiler:The player's decisions determine the answer, if they try to save Sunny and Basil.]]
** [[spoiler:As for the Hikkikomori route: can fantasy and hiding from reality be as satisfying as facing the truth and growing?]]
* DyingToWakeUp: After completing each Headspace segment, which takes place in DreamLand, you wake yourself up by stabbing yourself with your knife. [[spoiler:However, doing this on any non-true route, after picking up another knife from the kitchen on the final day and going to sleep again will prompt one of the two possible neutral endings by having Sunny [[YourMindMakesItReal stab himself with it in his dream]]]].
* EarlyGameHell: Right at the start of the game, your Heart pools are low enough that basic enemies can take out your squishier characters in two to three hits, and Hero's basic healing skill drains a large portion of his Juice. Things get much better near the end of the Otherworld arc where you have more skills to use, better equipment, and upgraded follow-up attacks.
* EarnYourBadEnding: There's a whole story route with exclusive content that ultimately leads to either of the Neutral endings, with the addition that [[spoiler:Sunny completely loses his sense of self to Omori before he either moves out or stabs himself to death, with Basil committing suicide off-screen]].
* EarnYourHappyEnding: [[spoiler:After all of the emotional hell Sunny, Basil, and their friends went through after Mari’s death, Sunny finally accepts her death and responsibility for his part in her death, choosing to no longer ignore his pain and thus Omori peacefully fades away. Basil is saved from committing suicide and their friends are brought back together in order to finally start healing from their trauma. And while we don’t see their reactions to being told the truth, and it’s unlikely that they will take it well, there’s a good chance that they will understand and eventually forgive Sunny and Basil. Additionally, if you watered Basil’s plants in Headspace, both Sunny and Basil’s Somethings will vanish, indicating that they’re ready to put their guilt and trauma behind them.]]
* EasterEgg: There is a hidden variable called "WTF" that is randomly set from 1 to 13 upon leaving the Neighbor's Room for the first time, after helping Aubrey out of the stump. [[https://pastebin.com/8m9JA7yL A series of unique events]] only trigger for either a specific WTF value or a range of values.
* EldritchLocation:
** [[spoiler:Black Space. While the White Space serves as a safe haven for Omori, Black Space is a distorted, twisted, and disturbing location created from Sunny's fears and repressed memories. It's also very hazardous for the dream world inhabitants, as staying even near it for too long will alter their state of mind and/or body.]]
** Collecting all of the keys [[spoiler:not only finalizes Basil's home into an absolute hellscape, but also inexplicably and dramatically lengthens the path leading to it]].
** [[spoiler:Headspace itself might be one of these, since there are a handful of [=NPCs=] that claim to have existed before Sunny's dreams reshaped it.]]
* EliteFour: Once you've beaten enough enemies in the Pet Rock minigame, the Hobbeez Shopkeep will tell you about the Four Veterans of Faraway Plaza, which you then can find and challenge. Beating them all lets you find and challenge the Pet Rock Champion.
* EmptyLevels: Everyone stops learning new skills past level 30, so everything up to level 50 is just extra stats, Heart, and Juice. Omori himself gets his final skill at level 35, and the only remaining abilities past that point are gained with new equipment or events. [[spoiler:That's because level 30 to 35 is about the range where you're expected to defeat Humphrey; from that point onwards, if you're on the Main Route, Headspace gives way completely to Black Space and Sunny's confrontation with the truth, and your stats are completely irrelevant at that point. This is meant to hide the fact that there are Hikkikomori Route-exclusive bosses that mandate leveling up further to improve stats.]]
* EnemyScan: Star-gazing with a minor character named Shawn gives Omori the "Observe" skill, though it only reveals an enemy's current health and Juice amount.
* EternalRecurrence: [[spoiler:It's explained, just before you can enter Black Space, that Omori and Sunny have done all of this before: Basil has vanished, and they've searched for him, collected keys, and reached Black Space. Every time, however, the world has reset, changing the location of Black Space, scattering the keys, and allowing Sunny to continue repressing his memories of the truth. This happens once again on the Hikkikomori Route, and reconnecting with his friends on the Main Route allows Sunny to finally break the cycle.]]
* EveryoneHasStandards: [[spoiler:If the Hooligans defeat Sunny and Kel, then everyone but Aubrey get sick of tormenting the same two guys and leave to go back home, leaving Aubrey by herself.]]
* EverytownAmerica: Faraway Town has the look of a generic suburban American town in TheNineties, with distinct house designs and front lawns.
* EvolvingTitleScreen: Four [[https://youtu.be/KJnHvCYVlDY after]] the initial White Space screen. [[spoiler:Upon arriving in Black Space, the title screen will turn dark with a low rumbling noise. In the last day, it will turn red with high-pitched ringing on top. Sunny and Omori will take turns on the screen with a glitchy effect. The bad ending's title screen has a sky background and ambient noises, but both Sunny and Omori are gone since the latter just jumped off a building. The good ending's title screen also shows the sky, but Sunny is present while a piano song plays]].
* ExactWords:
** A lot of the game's marketing materials bring attention to how the story of the game revolves around choosing between two worlds, and it ''implies'' that said worlds are the safe but stagnant White Space and the less certain but more eventful Headspace. Except, neither the marketing nor the game itself ever actually ''specify'' what they're referring to, and it isn't until the FirstEpisodeTwist that it's made clear that the "two worlds" that are being referred to are instead ''the real world'' and Headspace as a whole. So, while you ''do'' have to choose between two worlds, they never said just what those worlds actually were.
** After Omori leaves his room, he can make toast. The toast pops off the toaster... and that is that. You ''made'' toast, but you do not ''get'' toast.
** [[spoiler:"You have been living here for as long as you can remember." Turns out, Omori was created as the walking {{repress|sed memories}}ion of Sunny's memories, meaning it is literally all he can remember.]]
** Upon getting a GameOver in battle, the message to try again is "Do you want to retry?" [[spoiler:After being inevitably defeated in the final HopelessBossFight against Omori, the message changes, provided you reached his fifth phase. It becomes "Do you want to ''continue?''" This is a hint that choosing Yes will not restart the battle from the beginning.]]
* ExplorerHorror: [[spoiler:Once you enter Black Space, combat takes a back seat as you are sent to explore a surreal dimension.]]
* EyeScream: [[spoiler:While trying to stop Basil from killing himself, Sunny gets stabbed in his right eye and blacks out from the pain. His last scene in the hospital has bandages over the damaged part of his face.]]
* FaceHeelTurn: [[spoiler:Upon reaching the final door in Black Space during the main route, Omori kills Headspace Basil [[KilledOffForReal one last time]] before climbing up and sitting upon his Throne of Hands, making it clear that now that he can't suppress the truth, he will punish Sunny for his sins, and becomes the FinalBoss on the last day.]]
* TheFaceless: One room in [[spoiler:Black Space]] features Omori's friends wandering around, but they're all faceless and silent. Sometimes [[spoiler:Mari]]'s dialogue portrait will either turn into Something or her ghost and [[spoiler:Basil]]'s will sprout Something's tendrils from his face.
* FaceYourFears: Omori has three major phobias: heights, spiders, and drowning. In Headspace, a giant ladder, spider webs, and ocean serve as {{Broken Bridge}}s: before Omori can access these areas, Sunny must confront a Something representing these fears in the real world: one makes him hallucinate that his staircase is much taller and longer than it is, one causes his home to appear overrun with spiders, and one [[spoiler:tries to pull him under when he saves Basil from drowning]].
* FailedASpotCheck: It's unknown if someone noticed that if Mari had [[spoiler:hung herself, her stockings would have been dirty from the yard, and the violent strangulation wouldn't explain the bloodstains on her shirt, including a few that suspiciously look like fingerprints. It certainly creates an AmbiguousSituation that Sunny and Mari's parents ''might'' have known what actually happened and covered it up to spare Sunny further anguish, or at least his mother did while his father walked out]].
* FalseFriend: [[spoiler:Omori is the one who put Basil in Black Space, to hide the truth about Mari's death from Sunny. The quest is one of many endless resets, and each one ends with Omori orchestrating one CruelAndUnusualDeath after another for Basil.]]
* FinalBoss:
** In terms of gameplay, [[spoiler:Humphrey the Whale is the last mandatory boss fight in the game, having about three phases to him. After defeating him, you'll gain access to Black Space, [[ShooOutTheClowns which brings an end to Headspace as a whole]] as the AwfulTruth begins to come out.]]
** Story-wise, [[spoiler:if you're on the Main Route, Omori is the Final Boss, though his is a HopelessBossFight that can't be won normally; if you're on the Hikikomori Route, there is [[NoFinalBossForYou no Final Boss per se]], with the game instead ending once you stab yourself in White Space, then either stab yourself again in Sunny's house or go into the car]].
* FirstEpisodeTwist: As noted below in WhamEpisode, the "Omori must choose between White Space or Headspace" conundrum is thrown out the window with all of it being revealed [[AllJustADream to be the troubled dreams]] of a boy named Sunny who is moving out of his town in three days. The real purpose of the game is to have him reconnect with his friends in real life while discovering what caused both [[WeUsedToBeFriends everyone's scattering]] in the first place and him going into his dreams.
* FissionMailed:
** When you access Breaven from the Orange Oasis, you'll be put into an IndyEscape segment but can only barely outrun a rolling boulder. Whether you get squashed or fall into a large pitfall, the game will remark "You died" with an edited GameOver screen before resuming in a new room as Omori gets up in a pile of flour bags.
** [[spoiler:You can't defeat Omori as Sunny, but if you've persevered to the final phase of the fight and then lose to him, you are hit with the game over screen and the choice to continue is presented with a sleeping Sunny in the background. [[LastSecondEndingChoice Your choice here]] will affect whether you get the good or bad ending.]]
* FlowerMotifs: During the prologue, examining Basil's various flowers will have him compare the characters to each one.
** Mari is represented by the lily of the valley, which is said to ward off evil spirits and point towards a bright future.
** Hero's is the rose and its many colors, because he's versatile and universally loved.
** Aubrey's is the gladiolus, which represent strength of character, and how Aubrey is honest and has strong moral values.
** Kel's is the cactus because of their resilience means they don't need much diligence to care for, and even someone like Kel can manage one.
** Omori's is the white tulip, because it's plain and simple, but also cute. Later, it's revealed that they actually represent Sunny -- he's not flashy or flamboyant, but comfortable and modest.
** Basil himself says that sunflowers always point towards the sun, and that he would like to live optimistically like such.
** Outside of Basil's garden, the white egret comes up a lot, and almost always with a mention of it meaning "My thoughts will follow you into your dreams". It's usually associated with Basil's grandmother [[spoiler:and the real Mari]].
* {{Foreshadowing}}: Has its [[Foreshadowing/{{Omori}} own page.]]
* TheFourthWallWillNotProtectYou: When you reach the last room in Black Space, [[spoiler:Omori]] stares into the camera for a long time [[spoiler:as he ascends the throne of hands, and sits, revealing that he is the ruler of Black Space and created it]]. Who else would he be looking at, especially since [[spoiler:we were playing at him]]?
* FreudianExcuseIsNoExcuse: This happens during Kel and Aubrey's confrontations in the real world. Kel calls out Aubrey for how she's treating Basil, one of her friends, by stealing his photo album and setting her gang on him. Aubrey then says she has the right to because of what Basil did, and tries to turn it on Kel by saying that [[spoiler:the friend group abandoned her after Mari died]] and so she has to live with the pain. Kel calls bullshit; he tells her that she wasn't the only one who suffered, especially Sunny, and that's no excuse for bullying. Aubrey herself later says that using [[spoiler:Mari's death]] to excuse her actions was inconsiderate to how Sunny, Kel, Basil and Hero were feeling.
* FrictionlessIce: [[spoiler:The Hikikomori Route-exclusive Snowglobe Mountain has rooms with ice that keeps Omori slipping on it in a fixed direction.]]
* FrothyMugsOfWater: Since all of Headspace is a childish fantasy, you'll encounter a lot of "adult only FRUIT JUICE", especially in the Last Resort since it's a casino. Real-life drinks are properly labeled, though.
* FurryConfusion: In Underwater Highway, there is a seacow farm containing non-anthropomorphic seacows. However, the farmer who owns it is an anthropomorphic seacow.
* GameplayAndStoryIntegration: One of the strongest elements of the game is how it incorporates RPG mechanics with its storytelling.
** Each of the party members' Follow-Up attacks represent how each character fits into the friend group from Omori's perspective. Note that two of Omori's Follow-Ups (such as attacking twice) {{avert|ed trope}} CombinationAttack, which represents how withdrawn and passive Sunny is in the real world.
** Sunny is the only party member in the real world whose emotions can't reach the second level of intensity, representing how emotionally shut down he is. That said, Omori is the only character ([[spoiler:outside of Basil in the Hikkimori BossRush]]) who is capable of reaching the third level of emotional intensity, showing that Sunny is capable of very deep feelings, he has just shut them all away.
** When Kel's the leader of the party, he'll absolutely refuse to eat pickles if they're in Mari's picnic. You'll have to switch to someone else if you want to heal up.
** The HalfwayPlotSwitch [[spoiler:to Black Space represents how Sunny can no longer hide behind his fantasies in order to escape his problems. In order to understand himself, Sunny has to go on a journey of deep introspection, much in the same way people cope with mental health problems in real life]].
** After Sunny, Kel, and Hero reconcile with Aubrey in the real world, Kel makes a lame joke, which Aubrey slaps him for. Checking the party afterwards will show that Kel is missing 10 HP.
** Your party's stats and skills are ultimately not pivotal to the game's endings. After all, all this strength is restricted to Sunny's dreams, and it doesn't make a lick of a difference in the real world.
** The console ports add a border to pad the game screen for widescreen displays. By default, the border changes according to the events in game; for example, in normal Headspace, the border is the signature purple with line drawings of the six main characters. [[spoiler:After you defeat Humphrey and the party has forgotten about Basil, he will be replaced with a single flower in that border.]]
** There sure is a lot of trash in the [[spoiler:Recycultist HQ]], but an observant player will notice that the trash is never added to their inventory when they pick it up. [[spoiler:This is because it's all just Sunny's daydream.]]
* GameWithinAGame: There are several of these in the Faraway Town segments:
** Sunny can play a Blackjack game on his computer which is implied to serve as the inspiration for the Last Resort.
** There's a space shooter arcade game inside Hobbeez called ''Captain Spaceboy's Space Adventure'' which can be described a cross between ''VideoGame/SpaceInvaders'' and ''VideoGame/YarsRevenge''.
** [[spoiler:There's a UsefulNotes/GameBoy-style ''VideoGame/{{Snake}}'' clone called ''Sprout Mole Eater'' that can be played on the arcade machine at Gino's Pizza that is your reward for feeding fish to the orange cat and retrieving the missing arcade part.]] This is the inspiration for the King Crawler boss and Sprout Moles in Pyrefly Forest.
** If you have a Pet Rock equipped, you can battle opponents across town through a ''Franchise/{{Digimon}}''-style Rock-Paper-Sissors minigame. This may have been the inspiration for Headspace!Kel's pet rock Hector (a literal rock with a face drawn on), named after his real-life dog.
* GenderBender: [[spoiler:On the Hikkikomori route, once Headspace is recreated]], Medusa will offer a bottomless potion that, if used underwater, will turn Omori into a girl until she uses it again, enters battle, goes above water, or looks in a mirror.
* GettingSmiliesPaintedOnYourSoul: As part of the Emotion system in battles, characters can be made to experience Happy status, whether from friend or foe. Being Happy isn't always a good thing, as while it raises turn speed and Luck, it also reduces hit accuracy and increases damage from Sad characters.
* GhostlyGape: It shows up from time to time, but it's most prominent with [[spoiler:the recurring warped hallucination of Mari that torments both Sunny and Omori, dubbed HELLMARI. This version of Mari has no eyeballs, leaving a pair of black holes where they should be, and a distended void for a mouth.]]
* GoMadFromTheIsolation: [[spoiler:Happens to Sunny in the Hikikomori route. If you stab yourself, wake up, and explore his house at night, you'll see disturbing hallucinations related to the incident that get progressively worse as the game goes on. If you leave the house on the first day but choose to stay indoors on the second, Sunny will vandalize the photo album that he acquired on the first day, like he previously did.]]
* GoMadFromTheRevelation:
** [[spoiler:At the end of Black Space on the Hikkikomori route, the Stranger forces Sunny into Black Space to get him to see the truth he's been running away from. The unprepared Sunny succumbs to the sheer stress of the situation and Omori has to step in to "save" him by taking over his body.]]
** [[spoiler:In the bad ending, Sunny, unable to come to terms with the fact that he killed Mari, lets Omori consume his consciousness, where he proceeds to [[DrivenToSuicide throw himself off the hospital roof]].]]
** Poor [[spoiler:Basil suffered this after Sunny killed Mari by accident. He took charge and ordered Sunny to grab Mari's body to take it outside, along with a jump rope to fashion into a fake noose if you go by the data-mining. If you choose to save real Basil on the Main Route, his eyes are bugging out as you try to talk him down, saying that surely Sunny wouldn't have hurt his sister, it wasn't him but the Something that has been haunting them that did the deed. Then he attacks, declaring that Something is behind Sunny and Basil must save him. Basil himself seems to be questioning why he thought faking Mari's suicide would be a good idea and he can't comprehend that it was a terrible, preventable, and senseless accident. It's implied that he gets better after waking up in the hospital and [[MyGodWhatHaveIDone realizing his error]] when seeing he damaged Sunny's eye badly, but Sunny reassures him that they'll be free from their secret, and it's high time they told the truth]].
* GottaCatchEmAll: One of the sidequests given to you at the beginning of the game is to collect keyboard letters for a game of Hangman. Said letters are scattered all over the game, and they must be collected if you want to play Hangman. [[spoiler:This is required to finish the Main Route, as collecting the letters and using the right ones will grant you access to Black Space. Three keys can only be obtained via the Hikkikomori Route. They're all not necessary to advancing the plot, but collecting the full set grants access to The Abyss and the {{Superboss}} Abbi.]]
* GratuitousDiscoSequence: One can be activated in a room in Otherworld, complete with {{moonwalk|dance}}ing.
* GreenHillZone: The Vast Forest contains large amounts of open grassland. It is also the first area of the game, filled with the weakest enemies of the game.
* GriefInducedSplit: It's implied that Sunny's DisappearedDad left the family after [[spoiler:the sudden and tragic death of Sunny's older sister Mari. Whether or not they knew he accidentally killed her is ambiguous]].
* GuestStarPartyMember: In the added content in the console ports, [[spoiler:Basil becomes Omori's partner for an extended boss rush. To compensate for the reduced party size, Basil is PurposelyOverpowered: his stats overall are higher than any other party member, his skills provide massive buffs and heals including his own variation of Omori's Red Hands, his Follow-Up Attacks change both his and Omori's emotions plus deal damage, and Omori's Release Energy with him provides a full party heal, status buffs, and a 5% Heart/Juice regeneration per turn for the fight in addition to the normal damage, and like Omori, he can reach level 3 emotions]].
* GuideDangIt:
** [[spoiler:There's an entire secret route of the game, which is accessed by refusing to open the door for any of your friends in the real world; doing this unlocks different parts of the Dream World, such as extra keyboard keys and proper boss fights against Something. Unfortunately, doing this also locks you out of the good ending -- staying home the whole time means Sunny's not really facing any of his problems, after all.]]
** [[spoiler:Completing every sidequest in Faraway Town during the course of three days is a gigantic pain in the ass. Not only do the [=NPCs=] not have the [[NoticeThis lightbulb icon]], but you must check for new quests or opportunities to progress ''in every period of the day: morning and evening, for each of the three days'' before you decide to end the day.]]
** [[spoiler:You can access and explore Red Space on the Main Route, but you need to do some unintuitive things to be able to reach it.]]
* GuiltInducedNightmare: Most of the nightmare areas in Headspace are representations of [[spoiler:Sunny's guilt about [[AccidentalMurder accidentally]] pushing Mari [[StaircaseTumble down some stairs]] and killing her]].
* GuiltRiddenAccomplice: [[spoiler:Basil helped Sunny stage Mari's death to look like a suicide, and because he can't believe that Sunny would do something so awful and not tell anyone, he conjures Something and imagines that it was the one who accidentally killed Mari and not Sunny. It's such a comfortable way of [[HandWave handwaving]] any bad thoughts away that Sunny starts believing that Something is haunting him too. When Sunny starts isolating himself from his friends, Basil believes that it's his fault and slowly starts to go insane from the guilt, ending only if Sunny manages to stop him from killing himself at the end.]]
* GutPunch: TheReveal during "The Truth" section: [[spoiler:Sunny starts collecting photos in the dream world that shows what really happened the night of his and Mari's recital. (You can also find out the full context from datamining the photos.) Mari didn't kill herself; Sunny got frustrated while practicing and tossed his violin down the stairs. She came to confront him, and wouldn't let it go because their friends saved up their money to buy the instrument for him. In a fit of anger, he pushed her down, completely forgetting that she was next to the stairs as well. Sunny [[MyGodWhatHaveIDone became shocked]] and ran down to check on Mari, [[PleaseWakeUp begging her to wake up]] and apologizing. He tried putting her to bed, and collapsed into a sobbing ball. All the while, Basil was watching. He ordered Sunny to take Mari outside, and grab the jumprope. They staged the AccidentalMurder as a suicide. Unsurprisingly, Sunny is in shock when he recalls this.]]
[[/folder]]

[[folder:Tropes H to Y]]
* HeKnowsAboutTimedHits: At the start of the game, interacting with the laptop brings up a variation of this. Your only available options are "stare at the screen", which is exactly that, and does nothing, and "look at the keyboard", which shows the basic commands for controlling your character.
* HeKnowsTooMuch: [[spoiler:This is the real reason why Headspace Basil disappears at the beginning of the game; Basil was put in Black Space by ''Omori himself'', as Omori was created as a defense mechanism to protect Sunny from the truth about Mari's death. If the party ever found Basil, Basil could reveal the truth behind Mari's death, so Omori deliberately delays finding Basil as long as possible by dreaming up Headspace adventures, and then if you're on the route to the good ending, kills Basil over and over to prevent Basil from talking about Mari's death.]]
* HereWeGoAgain: [[spoiler:The bad ending of the Sunny route ends with Omori in White Space and then entering the Neighbors Room and forming up with his friends, just like at the very start of the game. Subverted when you exit the room; instead of emerging out into the Vast Forest, you've found yourself on the hospital balcony in the real world. [[DrivenToSuicide "It's a long way down...Do you want to jump?"]]]]
* HeroicMime:
** Omori doesn't actually say anything during the game's conversations, which are entirely between the other party members. You only learn of his thoughts through some of the environmental descriptions. [[spoiler:This all changes at the end of the Main Route after he takes the role of FinalBoss, where he spends most of the fight trying to [[BreakThemByTalking break Sunny]].]]
** You also don't hear any of Sunny's dialogue. [[spoiler:It all changes in the good ending with the final line: "I have to tell you something."]]
* HideAndSeekHorror: One section of [[spoiler:Black Space 2]] has you playing Hide and Seek against [[spoiler:[[MirrorMonster your own reflection]]]]; it starts with you having to find mirrors throughout the map until it leaves the mirror and start trying to find ''you''.
* {{Homage}}: [[spoiler:Black Space is one giant reference to ''VideoGame/YumeNikki'': A HubLevel surrounded by doors that take you to surreal and creepy looping areas. Though unlike Madotuski's dreams, Black Space concretely represents something in the game's narrative: All the repressed, blocked-out memories that Omori doesn't want to acknowledge.]]
* HopelessBossFight: [[spoiler:You cannot defeat Omori as the FinalBoss, at least in terms of traditional gameplay. The only way to "win" is to push Omori to his fifth phase, upon which the phase transition message changes from "Omori did not succumb" to "Omori '''will''' not succumb". Omori then starts to disable your healing and skills to ensure you die: if you push him to his sixth phase anyways, Omori will no longer take meaningful damage and will only use a high-damaging attack to make sure the player gets the hint. Your choice on the subsequent GameOver screen [[LastSecondEndingChoice determines the ending you get]]. Downplayed in that you still need to reach the fifth phase before dying to continue, which does require a decent amount of effort and gameplay. The fight still has a win condition, it's just not a traditional win.]]
* HopeSpot:
** [[spoiler:At one instance of Omori finding Basil in Black Space, the two enter an elevator with the player supposedly being able to enter a section of their choosing in the colorful Headspace. Regardless of such, the elevator's door opens to the same area in Black Space, and the door [[OffWithHisHead closes on Basil's neck]] when he tries to leave.]]
** [[spoiler:On the final day, Aubrey makes up with everyone else, and everyone decides to have a slumber party at Basil's house to comfort him after the hospitalization and loss of his grandmother and before Sunny moves. Then Sunny wakes up and checks up on Basil, who goes insane, [[FromBadToWorse and Sunny is forced to fight…]]]]
* HorribleHousing: One of the worst scares is in Faraway Town: On the last day, Sunny and Kel enter [[spoiler:Aubrey's home, and find it rundown beyond belief. Trash and neglected belongings litter every room, and the fixtures are all in ruins. And what's more, Aubrey's mother, the only adult in the house, is so focused on the TV that she won't even notice you there]].
* HospitalEpilogue: [[spoiler:The good ending of the game has Sunny wake up in a hospital, where he and Basil are recovering from the injuries they sustained during their fight. The latter’s room is where Sunny begins to tell the truth about Mari’s death to his friends. During the bad ending, Sunny will still be in the hospital, but instead of revealing the truth, [[DrivenToSuicide he’ll commit suicide by jumping off a balcony]].]]
* HyperactiveMetabolism: Characters are healed through consuming food. You even have a banana whisper this into Omori's ear when you pick it up (though bananas are the one fruit you don't eat). Moreover, Hero can produce an indefinite amount of cookies during combat to heal himself or others, as long as he has enough juice for that. This is completely averted in the real world segments, where you can only heal through using normal items like bandages and first-aid kits, while the snacks you've grown accustomed to will only heal a few hit points at best.
* IFellForHours: [[spoiler:The credits for the bad ending show Sunny taking a long, long fall down the hospital building.]]
* IHaveNoSon: In one of the hangman key holes, you can find a man chopping down a tree. Approaching him causes him to say "Stay away. You are not my son." [[spoiler:This can be interpreted as him rejecting Sunny as his son after Mari's death, or literally meaning that Sunny is not Omori.]]
* ImpairmentShot:
** Between when Sunny eats expired steak and when he throws up in the toilet, the screen will be wobbly and distorted to reflect the disservice his stomach was done.
** At the end of the second to last boss fight against [[spoiler:Basil, Sunny's right eye is stabbed. The right side of the screen turns black to show this]].
* InfinityMinusOneSword:
** You can find strong weaponry for all three of your party members within Humphrey. They're one step down from some of the game's own strongest equipment, but obtaining those either involves completing sidequests or traversing areas exclusive to the Hikkikomori route.
** Doing "A Cool Inspiration" sidequest rewards you with Cool Noodle, Aubrey's second strongest weapon. It can be completed just after finishing Last Resort.
** Finishing "Weeping Willow" sidequest gives Hero the LOL Sword, a weapon that gives him a sizeable Attack increase. If you also got the Attack bonus from Scare-bro, even [[StoneWall Hero]] can dish out some decent damage. The quest can be finished once you get access to Underwater Highway, just right before Humphrey.
* InfinityPlusOneSword:
** If, on the Hikkikomori route, you take the trouble to gather all the keys and then [[spoiler:defeat and [[DefeatMeansFriendship spare]] [[OptionalBoss Abbi]] in the Abyss,]] you can find eight very powerful items scattered around the world, being a weapon and a charm for each character. The weapons are even labelled as "'s ultimate weapon". Barring very specific and niche builds (such as Flex + Run'n'Gun Kel needing the Chicken Ball to deal maximum damage), you usually want to equip most of them.
*** [[JackOfAllStats Omori]] gets the Red Knife, which also increases all of his stats. His associated Charm, the Cough Mask, further increases all stats.
*** [[MightyGlacier Aubrey]] gets the Baseball Bat, which in addition to high attack power, also increases her somewhat low Speed and improves her Luck so she can deal more critical hits. Her associated Charm is the Pretty Bow, which further increases her already large Attack and Heart.
*** [[FragileSpeedster Kel]] gets the Basketball, which gives him a large Juice boost to accommodate his various support skills. It also gives him a massive Speed boost[[labelnote:note]]The Chicken Ball gives more Speed, but does not give any other stat increases, not even Attack[[/labelnote]] to ensure he goes first and strengthen his Run n' Gun skill. His associated Charm, the Headband, further increases his Juice, Attack, and Speed.
*** [[TheMedic Hero]] gets the Ol' Reliable, which has high attack power, decent bonuses to both Heart and Juice, and an effect to increase the power of recovery items by 50%. This effect applies even if Hero is not the one using the item. His associated Charm, the Chef's Hat, greatly increases his Defense, and gives 5% Juice regen every turn.
** In the Hikikomori route, Omori gets a collection of supremely powerful skills:
*** Red Hands is stupidly powerful, dealing heavy damage to a single target four times. Nothing else in the game can even remotely compare to the boss-killing potential of this move (except a Kel Run n' Gun nuke, but that requires more setup). Against a single target, it can handily out-damage Release Energy, especially when combined with emotional advantage and a Tickle from Kel to make all four damage ticks hit right in the heart. Unusually for what is arguably the most powerful skill in the game, you obtain it completely for free right at the start of One Day Left, so it serves more as a way to level the playing field between you and the more powerful bosses on this route than an ultimate reward for your efforts.
*** There are also Vertigo, Cripple, and Suffocate, the three phobia attacks, obtained for [[spoiler:killing the corresponding Somethings in the Lost Library]]. Each of these hits all enemies for heavy damage and harshly drops one of their stats, making them a massive upgrade to Mock, Trick, and Shun, respectively; [[spoiler:they also turn the aforementioned [[OptionalBoss Abbi]] into a joke, thanks to simultaneously hitting and debuffing all her tentacles]].
* InNameOnly: Outside of Omori himself and White Space, almost nothing in the game is even remotely related to the original comics. Even then, Omori is a completely different kind of character than he was in the comics, being a child rather than a teenager and having significantly more development and different motivations. The rest of Headspace and the real world, including the vast majority of characters and locations found within them, are made for the game with no basis in the comics. [[Administrivia/TropesAreNotBad Note that none of that is necessarily a bad thing, however]].
* InterfaceSpoiler: When [[HelloInsertNameHere naming Sunny]] after he wakes up for the first time, [[spoiler:you understandably cannot name him "Aubrey", "Kel", or "Hero", but you also cannot name him "Omori". This may be your first indication that Sunny and Omori are not the same entity]].
* InterruptedSuicide: Choosing to do this [[spoiler:leads you to the path towards the best ending]]. On the main route, if you learn [[spoiler:the truth, the game notes that Basil needs saving. If you don't do this, Basil will stab himself with his garden shears and bleed out while his friends sleep obliviously. Going into his room causes Basil to lash out at you instead, and you have to fend him off to the best of your ability. On the plus side, it's the only ending where Basil most definitely survives the encounter]].
* InUniverseSoundtrack:
** Certain songs are played InUniverse in Headspace, due to them being part of Sunny's memories. [[spoiler:The title theme's {{Leitmotif}} is based off the duet Sunny never got the chance to perform with his sister.]]
** Faraway Town has several [=CDs=] that contain remixes of songs in the official soundtrack, which can be played in a jukebox at Gino's.
* IRejectYourReality: Sunny's FatalFlaw. He's in denial about the way things have changed over several years, from his friends having become estranged to [[spoiler:Mari being dead]]. It's especially evident on a replay when he thinks he hears Mari asking her to let him inside the house, only for what he lets in to definitely ''not'' be his sister, in a sense. [[spoiler:The only way for Sunny to recall the truth of what really happened is if the player pushes him to do so, save Basil, and confront Omori.]]
* JokeItem:
** After accepting one of Berly's sidequests in the late game, a mailbox vendor offers you a Pool Noodle. It's a weapon for Aubrey, but it's so weak it imposes stat ''penalties''. Its true purpose is to be material for Berly to reforge into a significantly stronger weapon.
** The Appendix charm, which is found in Humphrey. The item's description tells you outright that it does nothing.
** The Gold Watch charm found in Deep Well decreases your speed by ten points and has no other benefits. [[SurprisinglyRealisticOutcome It's made of gold, what did you expect?]]
* JumpScare: Several, given that it ''is'' a horror game.
** Checking a floating mirror will display a reflection of Omori with his smiling friends behind him. Rarely, [[https://youtu.be/XjyIP5g7Qlc the text box won't appear]] and all the kids in the reflection will [[NightmareFace flash distorted smiles]] as the scene cuts away.
** [[spoiler:Entering through certain doors has a ''very'' small chance of Omori landing in a creepy Black Space event in a vein similar to ''VideoGame/YumeNikki''.]]
** Opening the door to "Mari" in the first real world segment will see the door opening slightly from Sunny's perspective, enough to see a vague shape beyond it, only for it to be thrown open suddenly to reveal a brief glimpse of a ghastly, bent-necked screaming apparition before the door slams shut.
* JustifiedSavePoint: "Taking a break" at Mari's picnic ground saves the game. Only Mari's red picnic basket works, though; you'll eventually find ''blue'' picnic baskets, and apparently those are just not nostalgic enough to be used as save points.
* KarmicJackpot: Both of the panhandlers in Faraway Park. One will give you a gold watch if you pay him enough, while the other wins the lotto on your last day in town and will pay you double what you gave him.
* KidsPreferBoxes: A series of photos from the [[spoiler:real-world]] photo album show [[spoiler:Sunny]] receiving a building block set for his birthday, only to show much more interest in the large box it came in, curling up inside of it with Mewo.
* KillerRabbit: [[BearsAreBadNews Rare Bears]] look like big, friendly teddy bears on the overworld, but if you approach them, they’ll rush at you and attack, with its battle sprite appearing similar to an actual bear with an Angry expression and it dealing large amounts of damage.
* {{Leitmotif}}: At certain plot-relevant events, [[https://youtu.be/7GIWV__qx4M a piano theme will play when Mari is involved]]. [[spoiler:There's actually a reason why; the piano was her preferred instrument in life. It gets a DarkReprise during "The Truth" section when a [[https://youtu.be/ynJQuqMsq0M?t=128 tinkling piano melody]] accompanies the moment where Sunny realizes that [[StaircaseTumble he pushed her down the stairs]]. It quickly segues into HellIsThatNoise, complete with a ScareChord for each new photograph.]]
* LethalChef:
** Sunny tries to eat a leftover steak after microwaving it just the once, not realizing it [[https://microwavemealprep.com/reheat-steak-in-microwave/#:~:text=Is%20it%20safe%20to%20reheat,165%C2%B0F%20before%20serving calls for more than that to make one safe to eat.]] Of course, he makes himself sick off it almost immediately.
** For a more literal definition, there's the Sprout Mole Chef. If Omori follows the first instruction of his cake recipe to the letter (rendering it underbaked) or uses any ingredients that don't belong in an actual cake recipe, the cake will poison him dead on the spot.
* LethalJokeItem: While exploring the Orange Oasis, it's possible to pick a fight with photorealistic chickens and rabbits, the former of which are [[MetalSlime extremely fast and try to flee as soon as possible]]. One specific chicken combines these traits with [[PermanentlyMissableContent only giving the player one chance to fight them]], but killing them gives Kel a Chicken Ball for a weapon. Its strength isn't remarkable, but it has one of the highest Speed stats in the game, which means Kel's ''Run and Gun'' will deal massive damage.
* LevelAte: Much of Orange Oasis is composed of various foodstuffs.
* LimitBreak: The "Release Energy" follow-up attack is this for the entire party (although only Omori can trigger it). It consumes all 10 Energy bars, requires all party members to be alive, and deals large damage to all enemies.
* LimitedMoveArsenal: Each party member can only choose up to four Skills to bring into a fight, and the DefendCommand counts as a skill too.
* LongRunners: InUniverse, ''Sweetheart's Quest For Hearts'' has been running for 42 seasons.
* TheLostWoods: The Pyrefly Forest is a gloomier, denser forest than the Vast Forest long before it. It's filled with fogs and creepy spider monsters. One hidden subsection is called the Lost Forest, which needs you to traverse the correct path or you'll return to the beginning.
* LuckBasedMission:
** If you decide to fight the Hooligans without using the [[spoiler:pepper spray]], which is a OneHitKO, then their DesperationAttack becomes this. They will attack six times and hit a random party member or both, and do this until they fall, so you basically have to hope they don't hit one party member enough to KO him.
** The Pet Rock minigame is literally a RockPaperScissors competition and the moves the enemy plays are randomized. Most foes have a [[PoorPredictableRock preference on what hand they'll play]] and figuring out their preferences can help you win. The Pet Rock Champion, on the other hand, has no preferences and has a whopping nine lives (you only have three), making beating them completely luck-based.
* MainCharacterFinalBoss: After Omori realizes [[spoiler:he can no longer hide the truth about Mari's death from Sunny he goes all out attacking Sunny and trying to make him [[DrivenToSuicide take his own life.]]]]
* ManaShield: When a character is Sad, a portion of the damage they take is given to Juice instead. Higher tiers of Sad (Depressed/Miserable) convert more damage to Juice.
* MassMonsterSlaughterSidequest: A bunny-hating leaf NPC in the Train Station gives you a quest to kill many of any kind of bunny. Mari states that Aubrey wouldn't take too kindly to such.
* MaybeMagicMaybeMundane:
** [[spoiler:It's hard to say if Omori and Something are simply [[EnemyWithin dream metaphors of Sunny's depression and guilt]], or if [[{{Tulpa}} they are actual beings produced by Sunny and Basil's breakdowns]]. Basil seems to sprout Something's shadow when he's having his DespairEventHorizon and attacking Sunny, while Sunny becomes Omori's monochrome self during the Hikikomori Endings; both are also happening when Sunny is having a full-scale meltdown and possibly hallucinating.]]
** Another confounding factor in this is [[spoiler:brief appearances throughout the game by what is heavily implied to be Mari's spirit, attempting to guide Sunny, on the true route. She even is implied to save Sunny from drowning. This is unquestionably a different entity from the usual Headspace Mari, who knows nothing about your trip through foggy waters on the way to Last Resort, and sure, that could be justified on its own as some part of Sunny's subconscious trying to encourage him to face the truth... Yet also, in a real-life segment, you also encounter this Mari playing the piano, which even Hero claims to have heard.]]
** [[spoiler:Same as with Mari's example above, there's debate over what exactly Stranger is. At first he seems to be another fragment of Sunny's psyque, specifically the one wanting to remember, but Stranger looks more mature and older than Headspace Basil, and he talks to Sunny with nostalgia and remorse. It could be that Stranger is capable of replicating Basil's mannerism thanks to Sunny knowing him so well, but the existence of the egret orchids, its meaning about thoughts and dreams, and Basil's associations with the flower implies that Stranger could instead be Basil's mental projection trying to help Sunny for both of their sakes.]]
** [[spoiler:The same could be said for Headspace and the dream reality in general. 99% of the game implies it's nothing more than Sunny's imaginary fantasy world, but certain characters (such as the Branch Coral and Mr. Outback) state some form of the world and at least some of its inhabitants existed before Headspace and Sunny, bringing the former conclusion into question. Is the dialogue just another layer of Sunny's imagination or is something more supernatural at play?]]
* MeaningfulName: Omori, on two fronts: Hikik'''omori''', and [[spoiler:Mement'''o mori''', as in ''remember death'', which is Sunny's entire struggle over the entire game.]]
* MediumBlending:
** While most of the game consists of sprites and drawings, some things use photos for stylistic effect. For example, the battle backgrounds are all heavily-edited stock images, the Rabbit? and Chicken? enemies in Dino’s Dig are actual photos of rabbits and chickens, and the [[spoiler:Throne of Hands in Red Space is made of edited photos of actual arms]].
** In addition to in-game footage, the first [[https://youtu.be/erzgjfU271g trailer]] used both hand drawn animations and real life photos and clips.
* MinorMajorCharacter: The game makes a point of introducing the Three Great Creatures, known as the Oldest, the Wisest and the Favorite, whose existence predates Headspace itself [[spoiler:and seem to be imaginary friends Sunny had since childhood]]. That definitely sounds like important information, but since Headspace doesn't exactly have any kind of hierarchy [[spoiler:and in the end, almost nothing in Headspace can truly impact the story]] they are pretty much irrelevant. [[spoiler:The Oldest is Humphrey, who is a major character but hardly matters to the plot; the Wisest is Abbi, an OptionalBoss who was locked away out of sight before the game even started; and the Favorite is... the big yellow cat in the Neighbour's Room, a ''piece of scenery'' based on Sunny's fond memories of the Faraway Park playground.]]
* TheMirrorShowsYourTrueSelf:
** Staring at mirrors in Headspace sometimes triggers a JumpScare where everyone flashes a creepy face, [[spoiler:hinting at Omori's and the dream friends' dark nature]].
** If Sunny checks a mirror, he'll often see Something standing next to him or outside the room. In some instances, it will take the full form of a ghostly [[spoiler:Mari]], and towards the end of the [[spoiler:Hikikomori route, after Sunny is fully repressed by his split personality, he will perceive himself as Omori in the mirrors]].
* MixtapeOfLove: The Special Mixtape, the PlotCoupon of the Otherworld arc, was made by Captain Spaceboy out of love for Sweetheart; unfortunately, now that she's dumped him, he no longer sees any use for it and throws it in the Junkyard. The party decides to fetch it in the hopes that playing it can help Spaceboy get out of his post-breakup blues.
* MoneySink:
** Commissioning Rococo's artworks. There are six artworks you can commission, and the price increases for each one. The first one costs 1000 Clams, quite hefty for the point you can first meet him. The last one costs a whopping 1000000 Clams, which requires a ton of grinding or beating the {{Optional Boss}}es of the Hikikomori route. You don't get anything except an achievement for completing all of them.
** Similarly, in the last day of the Hikikomori route, you can commission a Gator Guy to sculpt statues of all your friends for an achievement. This time, though, his prices stay constant at 3000 Clams per statues.
* MoneySpider: All of the enemies seem to carry clams, which act as the game's currency. Don't ask why a Forest Bunny would be needing them.
* MoodWhiplash:
** The game starts from Omori's room which is mostly a black-and-white void scored to an equally depressing tune and where there's nothing to do, and immediately goes to "neighbour's room" which is dominated by bright shades of purple, has flowers around and several happy kids playing skipping rope, the ladder outside literally has all its steps rainbow-colored and has a cheerful melody playing as well. The contrast literally couldn't be stronger, even if there are still off-beat elements like a small tentacle harmlessly poking out of the ground for seemingly no reason.
** The console ports add an extended Boss Rush for Omori and Basil that ends with a fight against a clone of Headspace Mari of all people. [[WhyIsntItAttacking She's harmless and does nothing but smile and heal the party]], though the way she dulls Omori's and Basil's emotions on every turn can be read as part of Sunny's subconscious resentment for her. After [[ZeroEffortBoss beating her up]] for a while, [[spoiler:the situation becomes all too familiar and she abruptly transforms into "Something in the Wind", Mari's hanged corpse. Sunny is dragged out of Omori against his will, but remains unable to confront the truth and Basil becomes frozen in fear. This goes on for a few turns until the text boxes stop loading, after which the corpse turns into "Hellmari" and [[JumpScare lunges into the screen]]]]. The scene then cuts back to outside of the boss rush room as if nothing happened, as Omori already erased everyone's memories of the incident.
* MookBouncer: The BlankWhiteVoid in the opening is "patrolled" by red hands called… [[MeaningfulName Red Hands]], which will instantly send Omori back to his room if they come into contact. Even the knife he picks up after looking at his sketchbook makes no difference. Then again, all he needs to do to actually exit is go through a nearby door, while the borders of the void will send him back just as effectively as the bouncers. [[spoiler:Said bouncers are actually {{Familiar}}s of Omori himself.]]
* MovingAwayEnding: [[spoiler:The good/neutral hikikomori route endings have Sunny moving away after confessing to his friends the truth about Mari's death and Sunny moving away without ever reconciling with his friends, respectively.]]
* MultipleEndings:
** [[DownerEnding Bad Ending]]: [[spoiler:Omori takes over Sunny's body completely and throws himself off the hospital roof while Music/BoEn's "My Time" plays. Gotten by selecting "No" on the retry screen after dying to [[FinalBoss Omori]].]]
** [[NonStandardGameOver "Neutral" Endings]]: [[spoiler:Basil will commit suicide if he isn't confronted at the end, with Sunny being able to see the corpse and his distraught friends if he went back to sleep at Basil's rather than just leaving. Once home, the player is required to sleep and then wake up to trigger one of two endings -- picking up a knife in the kitchen will cause Sunny to commit suicide after Omori stabs himself in the dream world, and not picking it up will make him move out with his family the next day while still wracked with guilt over everything as Something follows him.]]
** [[spoiler:Early Hikikomori Ending: Once Omori does a SplitPersonalityTakeover, he can wander around the house, which also allows him get the knife from the kitchen -- this restores his Stab warping option, which… [[SurprisinglyRealisticOutcome does exactly what you think it does in the waking world]]. As the credits roll, a phone rings in the background.]]
** [[spoiler:Hikikomori Ending: If Omori doesn't get the knife, then the game rolls to the corresponding Neutral ending. However, Omori is now in control, and one can only dread how he'll try and enforce his Headspace rules on the real world. As the credits roll, sirens blare during the whole thing, implying that Basil has committed suicide.]]
** [[BittersweetEnding Good Ending]]: [[spoiler:Gotten by selecting "Yes" on the retry screen after dying to Omori. Sunny stops Omori by remembering the good times he had with his friends, and wakes up in the hospital after his fight with Basil. He then visits Basil's room and is implied to explain what really happened with Mari.]]
*** If the player has been taking care of Basil's plants throughout the game, [[spoiler:[[TheStinger an extra scene]] plays after the credits showing what happens after Sunny visits Basil. At first, Basil looks at Sunny with a sad expression, with his Something behind his head seeping into his pillow. In return, Sunny genuinely smiles as his own Something fades out behind him. Basil then returns this genuine smile and his Something leaves as well, with this signifying that they’re both ready to move on from their guilt.]]
* NeverSayDie: Conspicuously so, in Headspace; dead bodies are simply described as "not alive", when they don't turn into literal pieces of toast.
* NeverTrustATrailer: The decision of "which world is real" between the simple-yet-lonely White Space and the colorful-but-insane Headspace is naturally very important to the game. If it weren't a complete RedHerring, that is, which the player will learn as soon as the tutorial section ends when Omori, or rather [[HelloInsertNameHere Sunny]], suddenly ''wakes up'' and adds the real world to the equation. While snippets of Sunny and Faraway Town were shown in the trailers, they could very easily be misconstrued as another part of the Dream World where Omori just [[HeCleansUpNicely puts on nicer clothes]], but in truth the "which world is real" dilemma has shifted to a choice between reality and dreams, using Headspace serving as a medium to explore Sunny's trauma and how Omori is connected to it.
* NoAntagonist: [[spoiler:The antagonistic forces in the game are either dream entities that have no significance on the game's actual story, or Sunny’s inner demons that are more a personification of unhealthy thoughts and trauma than actual characters. There isn’t a real antagonist in the game that isn’t a hallucination or a dream.]]
* NoEnding: [[spoiler:For Headspace, anyway. Once Omori enters Black Space after clearing Humphrey, [[ShooOutTheClowns everything and everyone else in there is forgotten about]]. Makes sense, considering that the whole thing was one giant distraction to keep the truth away from Sunny. The last we see of the Headspace kids, they have no dialogue in either ending on the main route. In the Hikikomori route, this is also the case; once Omori takes over, hits the ResetButton, and then wakes up from the dream on the final day, all that's left is for him to either commit suicide or leave Faraway Town. In short, Headspace has no ending because [[EternalRecurrence it's not supposed to]].]]
* NonStandardCharacterDesign: The various Something enemies range from claymation to photorealistic in their designs compared to the rest of the game's {{Animesque}} art style.
* NonStandardGameOver: [[spoiler:The aforementioned Neutral endings end the story before the final boss and close on a blank credits roll with a droning noise of sirens in the distance, and possibly an unanswered telephone as well.]]
* NoSympathy: Aubrey sees Sunny for the first time in years since [[spoiler:Mari died]], and Kel politely asks her to stop picking on Basil. What's her response? She mocks Sunny by asking how long it has been since he left the house. Aubrey also challenges the boys to a fight, which goes wrong whether or not you decide to slash her with the steak knife. Much later, long after Kel's WhatTheHellHero has sunk in, she apologizes to Sunny for her insensitive remark, and for being a jerk.
* NoticeThis: Every NPC with a new or pending sidequest is indicated with the lightbulb icon above their heads. [[spoiler:Unfortunately, this only applies to the inhabitants of Headspace, not the citizens of Faraway Town, who have their own sidequests as well.]]
* NotWhatItLooksLike: Kim and Maverick claim this when Sunny and Kel hear Basil calling for help. They rush over to the lake and see the gang cornering Basil. The Hooligans say that they didn't do anything to him, that they just showed up to meet as usual at the lake, and he started screaming at the top of his lungs. Kel obviously doesn't believe them because he saw Aubrey bullying Basil before and had stolen his photo album. [[spoiler:The good and bad endings imply that they were telling the truth, as Basil also screams at Sunny when the latter tries saving him from his suicide attempt]].
* OcularGushers: Telling the Weeping Willow the cheese joke results in her crying a veritable fountain of tears.
* OffModel: Looking in a mirror in the real world shows that Sunny has his eyeshines [[spoiler:before it is determined if Omori or Sunny will disappear]].
* OminousMusicBoxTune: [[https://youtu.be/M0WsQXD8788 Playing Forever]] is a childish music box tune that feels just off-kilter enough to make the listener unsettled. Not helping is its perversion of the game's main theme about a minute in. [[spoiler:This is first heard during the Hikkikomori Route as Omori hits the ResetButton for Headspace, retreating into childish adventures in his dreams once again without addressing the source of his trauma.]]
* OnceMoreWithClarity: Nearly a literal example of this. Something haunts Sunny in his nightmares, and in the waking world on the Hikkikomori route; Sunny can't fight back to win. He can only listen to Mari and breathe through it, to Persist or Calm Down. When he's ready to face it, Sunny learns Focus on the One Day left nightmare, and looks. [[spoiler:It's a body dangling in the wind that comes into view, but the player still doesn't know what it is. Then we get to the dream sequence where Sunny -- and the player -- learn that Something is a body hanging from a tree. It's Mari's body, which Basil and Sunny strung up to make her accidental death look like a suicide. You had to collect photos out of order; they start playing in order after you find them all, along with the tree in question where they strung up the noose. They show the exact sequence of events: Sunny smashed his violin while practicing the day of recital, leading to Mari confronting him. He pushed her down the stairs in a fit of anger, tried rousing her when he saw she was crumpled on top of the broken violin, and tucked her into bed. Basil saw what happened, and grabbed Sunny, who was in [[MyGodWhatHaveIDone despair]], ordering him to help get Mari's body outside and grab the jumprope. They strung her up, and Sunny looked back. One of her eyes opened in rigor mortis, and that formed his nightmare of Something.]]
* OneSteveLimit: You can't name Sunny after any of your friends, [[spoiler:or Omori himself]].
* OpinionChangingDream: Sunny spends the entirety of the game refusing to tell anyone about the nightmares and psychological issues he is experiencing because [[spoiler:he would have to confess accidentally killing his sister Mari to his friends, who loved her as much as he did]]. But in the best ending route, [[spoiler:after a scuffle with Basil ends with the both of them in the hospital, Sunny engages in a BattleInTheCenterOfTheMind with the titular Omori, who tries to drive him to suicide — should Sunny win by accepting what he did, he decides when waking up that he should not bottle his feelings any longer, and the game ends with him about to confess what he did]].
* OptionalBoss: A good number of them, ranging from "you literally can't miss it" to [[GuideDangIt "how the hell was I supposed to find that?"]]
** A big, sturdy tree. It doesn't attack back or anything, but it has so much defense that without an ArmorPiercingAttack, you stand practically no chance of ever defeating it.
** Kite Kid, a DualBoss who fights together with his bat-like kite, found on a floating island in the Vast Forest. His battle is unnecessary for plot progression.
** The first battle with Pluto in the Otherworld can be missed if you choose to not interact with him or to flee. If you do choose to face him, he is impressively powerful compared to the enemies you've faced so far. He actually consists of '''three''' enemies (himself and two arms), giving him a ton of actions in combat, and he packs an impressive amount of tricks, including the ability to make himself Happy and your party members Angry to gain the emotional advantage. All this before you've even faced your first WakeUpCallBoss in Space Ex-Boyfriend.
** Planet Earth, which is in Captain Spaceboy's backyard. [[spoiler:On the Hikkikomori route, you can have a rematch with Earth, who teams up with Pluto in his final form.]]
** King Carnivore, a giant ManEatingPlant in the Sprout Mole Village, can be skipped or even killed without ever engaging him in combat, with the only penalties being missing out on a journal entry, a ton of EXP, and a single-use mass emotion inducer (which one he drops depends on his emotion at the time of defeat). You can choose to tackle him before Sweetheart's Castle, at which point he would prove to be an almost unsurmountable foe, hitting like a heavy assault vehicle and coming accompanied by two roots that like to heal themselves and him. [[spoiler:The strategy to defeat him [[GuideDangIt is rather counterintuitive]], too — you need to make his roots Sad, which stops them from doing anything. Since his sweet scent attack makes the whole party Happy, choosing to give the enemy emotional advantage over you is one hell of a ViolationOfCommonSense.]]
** The Unbread Twins are the boss of the completely optional Orange Oasis.
** The 1.0.8 Update added [[spoiler:Snaley]] of all people as a new optional enemy.
** The Hikikomori route provides additional bosses to face, since Headspace has a lot of extra content there. They don't classify as RouteBoss since their defeat is not essential to completing what's left of the plot.
*** [[spoiler:The heartbroken Captain Spaceboy, now known as Space Ex-Husband, resides at the top of Snowglobe Mountain.]]
*** [[spoiler:[[{{Superboss}} Perfectheart]], the "Perfect" clone of Sweetheart that the Slime Girls made, found by returning to Humphrey on the Hikkikomori route. Mutantheart and Roboheart are also available to fight, but are much easier.]]
*** [[spoiler:Proper boss fights with Sunny's fears, found only in the Lost Library. Omori gains a new skill from each one, and defeating all three unlocks access to Black Space 2.]]
*** [[spoiler:Nancy, one of Sunny's imaginary friends corrupted by Something. It can only be found by inspecting the tree with the tire swing in Vast Forest.]]
*** [[spoiler:ABBI, a tentacled… thing[[note]]Originally a character from the original ''Omori'' comics and heavily implied to be The Wisest of the Three Great Creatures before she was cast out and banished[[/note]] found deep within The Abyss after finding all 26 Keys.]]
* OverlyLongGag: The Spelling Bee, a cute talking insect who likes to R-E-A-L-L-Y S-L-O-W-L-Y spell everything it says. [[spoiler:It has a chance to show up again in Humphrey, in the middle of a ChaseScene. [[SchmuckBait Go ahead, talk to it, you have more than enough time for that.]]]]
* PajamaCladHero: In headspace, all of the main four except Omori (who appears to be wearing shorts and thigh-high stockings) wear what look like pajamas(Aubrey in a nightgown, Kel in an undershirt and Hero wearing something that looks like it belongs to ComicStrip/LittleNemo). Especially literal in ''Hero'''s case.
* PatchworkMap: [[WorldOfChaos Headspace]] has areas that have very little in sense of cohesion. {{Justified|Trope}}, as the places are parts of a dream world.
* PeninsulaOfPowerLeveling: The [[ShiftingSandLand Orange Oasis]] is a level not important to the main plot. But in addition to sidequests, it also provides some nice grinding opportunities.
** The bunnies outside are very nice for grinding. If you go there as soon as possible, you are likely about Level 14 or so. The bunnies outside of Dino's Dig drop lots of healing items that heal for 150HP (Pancakes, etc.) and also Juice items, and they give about as much XP as the enemies in Pyrefly Forest (which is your next story destination), but they do far, far less damage (especially after you get a few levels and you're almost 20; they do 0-5 per hit) and Hero isn't afraid of them like he is the enemies there. These will get you up to the levels you need to survive the snakes/bun bunnies inside the Dino's Dig. They ''also'' count for the bunny quest at the Train Station, too!
** The enemies inside Dino's Dig are tough, but they can give a lot of EXP when defeated. In fact, the enemies at the upper layers of Dino's Dig are some of the toughest random encounters in the game, but also give more EXP. In addition, the digging itself also gives you a plethora of healing items. In the last day of the Hikikomori route, this trope is even invoked, as all enemies inside the dig now gives even more EXP, perfect for grinding until max level.
** The swarms of [=UFOs=] in the Otherworld can be useful for early-game leveling. Because their health is incredibly low, a single Kel-Hero pass will usually wipe out the whole horde before they can even fire the first shot, all for zero juice investment or health lost by the party.
* PermanentlyMissableContent: ''A lot.''
** Finishing the Junkyard before the secret boss fight with Pluto in Otherworld will render that fight and its entry in the Foe Facts permanently unobtainable for the rest of the game.
** Starting Two Days Left (defeating Sweetheart and exploring the Lost Library) in the main route will render every sidequest in the Playground inaccessible as well, since [[spoiler:everyone moves away to Last Resort during the next Headspace segment. If you're on the Hikikomori route after reconstructing Headspace, talking to Mr. Jawsum will have him hand over ownership of the Resort to Hero, causing the playground inhabitants to return to the Playground so that you can finish up any unfinished quests. Doing this, however, causes Berly's "Call for Inspiration" quest to be inaccessible, if you left it unfinished at that point]].
** If you finish Breaven, [[OneTimeDungeon you won't be able to revisit anywhere past its magic circle]], because the one ingredient you need to sacrifice is already dead (but its ghost can dig you back up to the surface). Which can be annoying if you missed the healing spot, since that's counted for completion of one of the game's achievements.
** [[spoiler:Once you enter Black Space during the Main Route, you [[PointOfNoReturn can't go back to Headspace at all,]] except in the Hikkikomori route where Omori pushes the ResetButton. The game at least warns you to explore Headspace while you still can and tie up any loose ends.]]
** There's a lot of sidequests during the Sunny sections that are very easy to miss. Be sure to check every house and talk to every character before advancing the story or going back home at the end of the day.
** [[spoiler:Choosing to take ownership of Sweetheart's Castle will lock you out of anything you haven't yet done there. Of note are Rococo's paintings, the Princess Ghost for the Ghost Party sidequest (making the whole thing impossible to finish), and on the Hikkikomori route, the revisit to the Lost Library and Omori's ultimate weapon from an Abbi tentacle.]]
* PictorialLetterSubstitution: The title screen replaces the second O in "Omori" with a black, glowing lightbulb.
* ThePiratesWhoDontDoAnything: Invoked; there are Space Pirates who joined the command of Space Boyfriend hoping to do awesome pirate stuff, but then nearly all of them left after seeing he doesn't actually do anything.
* PlatonicDeclarationOfLove: [[spoiler:On the final day, after Sunny, Kel, Hero, and Aubrey have all reunited and the latter three have had a heart-to-heart about the aftermath of Mari's death, they all declare that they are once again friends, and that they'll be there for Sunny, even if he moves away. Sunny uses the memory of their words as the basis for his self-healing Cherish skill in the final battle, along with his memories of his mental Basil and Mari cheering him on toward the truth.]]
* PlayingTheHeartStrings: Used to heart-wrenching effect during the [[spoiler:final fight of the Sunny route]], as the violins, instruments which we didn't hear in the game so far [[spoiler:and for good reasons, as Sunny discarded his instrument a long time ago]], take up the stage, soar and cry, in an emotionally devastating performance, as [[spoiler:Sunny confronts Omori, the personification of his self-hatred and desire to take his own life, armed with the very same object central to his sister's death]].
* PlotIrrelevantVillain: [[spoiler:Almost ''every'' boss in Headspace has nothing to do with that world's paper-thin "plot" of Basil's disappearance. Very much intentional, as Headspace is a distraction that serves to prevent Sunny from acknowledging his ''real'' problems.]]
* PointOfNoReturn: [[spoiler:Accessing Black Space for the first time will lock you out of exploring Headspace if not on the Hikikmori route.]]
* PoorCommunicationKills: The crux of the plot in the real world, which drives a wedge between the group's friendship. [[spoiler:Mari's death being MadeToLookLikeAnAccident ended up causing Hero to think he failed to prevent her suicide, and Aubrey in particular feels like everyone tried to forget about Mari altogether which drives her to physical violence towards them. The inability for Sunny and Basil to come to grips with their guilt and speak out about the incident as they keep butting heads with the group for it nearly causes both to kill each other and themselves, and ''will'' if you take the wrong choices.]]
* PoorPredictableRock: With the Pet Rocks minigame you can go about Clashing with potential opponents, some of which are more predictable than others. Kel, your initial opponent, follows this trope literally -- the only thing he'll throw is rock so you can defeat him with ease despite his health advantage. Other opponents have varying degrees of randomization in their hands. [[spoiler:The Pet Rocks champion has no preference for any hand, rendering her battle a complete LuckBasedMission.]]
* PopStarComposer: In addition to "My Time", bo en contributed two battle themes to the game (the forest battle theme "Tussle Among Trees" and "Splintered Sweets In The Castle", the battle theme for Sweetheart's Castle.)
* PowerfulButInaccurate:
** Defeating Space Ex-Boyfriend yields his eyepatch as a Charm. It gives a sizeable Attack boost, but because you're hampering your vision your hit rate drops.
** Completing Pessi's sidequest after defeating Sweetheart yields the Sweetheart Bust. It's one of Aubrey's hardest-hitting weapons, but because it's so heavy it bogs down her Speed and her ability to hit her target.
* ThePowerOfFriendship: A recurring theme throughout the entire game. Sunny (and by extension, Omori) is powerless without his friends. A literal example is the [[CombinedEnergyAttack Release Energy follow-up]], but other examples include the various times that Sunny and Omori are able to do things purely because his friends are there with him: [[spoiler:entering the Piano Room for the first time, going out into the backyard,]] and one could argue that the entire Faraway Town segment is only possible because of Kel being there with Sunny. Also, the Seashell Necklace doesn't have magical powers, but it gives Sunny extra stats, not because of the properties of the item itself, but because of the sentimental value it has in Sunny's mind; it reminds him of friends and the warmth he feels around friends, thus making him mentally stronger.
* PrecisionFStrike: Having a very specific WTF Value[[labelnote:*]]13, amounting to a 1 in 13 chance per new playthrough[[/labelnote]] will make a Humphrey bump say "I fucking love air conditioning." It's the only F-bomb in the game.
* PrefersGoingBarefoot: Aubrey, Basil, Kel and Hero are barefoot in headspace, likely to fit with their pajama outfits. Subverted with Omori wearing knee-high socks, and Mari wearing shoes.
* ProductPlacement: Naming Sunny "Omocat" gives you an achievement with a discount code and the address to Omocat's online clothing shop.
* ProlongedPrologue: It takes until after the defeat of Space Ex-Boyfriend (a few hours of gameplay total) before the game finally transitions from "Prologue" to "Three Days Left." To many a player, the Otherworld arc may not feel like part of the prologue ''at all'' since you've been introduced to most of the game's mechanics and are starting to get free rein over where you want to explore.
* ProtagonistTitle: Seemingly a straightforward example at first, but subverted as the game begins to focus more on Sunny's narrative. [[spoiler:By the final day, it gets inverted to an AntagonistTitle.]]
* PsychoKnifeNut: Omori's only weapon is a knife, and he never lets go of it throughout the game. When he picks it up, the message emphasizes the "nut" part by stating "you can see your reflection clearly in the blade". The fact that the knife appears after he looks at the drawings in his sketchbook, which contain plenty of gruesome scenes, is also hardly a good portent.
* PunBasedCreature:
** By interacting with bookshelves in two specific locations, you can encounter the dust bunny, a {{Living Dust Bunn|ies}}y that takes the form of a bunny made out of dust.
** Wormholes are found in Otherworld, and appear as vortexes with literal worms coming out of them. The Junkyard area of Otherworld also has the doombox, an living, antagonist boombox.
** Pyrefly Forest has the [[WesternAnimation/BugsBunny bug bunny]], a bunny with the legs of a spider.
** Orange Oasis has several enemies with pun-based names. In the Arrow Cave area, you can encounter the Gingerdead Man, a zombie-like gingerbread man. By using the summoning circle in the Breaven, you can fight a {{Creepypasta}} (a living rigatoni pasta tube that constantly turns into a creepy version of itself), copypastas (living rigatoni pasta tubes that can clone themselves), and hushpuppies (literally poorly-drawn, screaming dog faces). The Dino's Dig area also has the porcupie, a fusion between a porcupine and a cupcake.
** Underwater Highway contains mussels, which are mussle shells with muscular arms coming out of them. There are also the squizzards, which are squids with wizard hats and beards.
** Within Humphrey, you can randomly encounter watermimics, creatures that disguise themselves as regular watermelons.
* RainbowSpeak: Words pertaining to gameplay elements are given colors. Equipment is purple. Snacks are green. Toys are orange. Key items are yellow. Skills are blue. Locations are light blue.
* RandomLootExchanger: You can talk to the Tofu [[DelusionsOfEloquence Conconnasisseur]] in the Orange Oasis to exchange 10 Tofu for one random healing item. Tofu is the weakest healing item in the game, bordering on JokeItem, and you can buy them for dirt cheap in another location, so this is always a good deal. He can give you strong healing items that you can't buy in shops, and even the weakest item he gives will be stronger than 10 Tofu.
* RandomNumberGod: A very interesting example: certain events and secrets can happen at random within each new playthrough, to make sure not every playthrough feels the same. This is due to the WTF value hidden in the game. When you start a new game and help Aubrey get unstuck from the stump in the prologue, the game will choose a number from 1 to 13. Said number includes a certain event that will happen during that playthrough and only that playthrough. Said number can also be modified so that players can see every event at their own leisure, kinda like the "Fun" value in ''VideoGame/{{Undertale}}''.
* TheReasonYouSuckSpeech: Omori [[spoiler:delivers a blistering one to Sunny during the final fight, which makes perfect sense since he's a manifestation of everything Sunny hates about himself and the guilt he feels about Mari]]. Eventually, it devolves into a MadnessMantra:
-->[[spoiler:'''Omori:''' '''You killed Mari.''' She loved you, and you killed her. Aubrey loved her, and you killed her. Kel loved her, and you killed her. Hero loved her, and you killed her. Basil loved her, and you killed her. [[GuiltInducedNightmare You loved her, and you killed her.]] You loved her, and you killed her. You loved her, and you killed her. [[BrokenRecord You loved her, and you killed her.]]]]
* RedHerring: The entirety of Headspace is revealed to be this. Not only is the "choice between Headspace or White Space" fake, but [[spoiler:your RPG-style adventures in the dreams will never get you closer to either Basil or the truth of what happened in the real world. This is because Headspace was literally made to distract Sunny from the truth. The only way for him to learn is by going outside and confronting the trauma, no matter how painful it is]].
* RepressedMemories: [[spoiler:Sunny accidentally killing Mari was so traumatizing that he repressed the memory of her death and created Omori and Headspace to distract him from ever acknowledging what he did. Refusing to go outside causes Sunny to repress his memories further and Omori initiates a SplitPersonalityTakeover to "protect" him. Going outside and reconnecting with your friends eventually leads to Sunny confronting those awful memories.]]
* ResetButton: [[spoiler:Various revelations within Deeper Well show that this isn't Omori's first foray into his dreams with Basil. Each time, he's found the entry to Black Space, rescued Basil from there, and restarted the cycle. Once Omori assimilates Sunny during the Hikikomori route and rescues Headspace Basil from Black Space, you get to see the reset button in action by going to sleep in the Neighbor's Room. Headspace is re-created, and in this variation, Basil never discovered the truth and more areas and side quests are unlocked.]]
* TheReveal: Sunny's nightmare in the Main Route's "One More Day" provides some startling clarity as he dreams of collecting photos around hospital beds. [[https://youtu.be/TNss9_Unqbk This video puts the photos in full context with data-mined captions]]: [[spoiler:Mari didn't kill herself. She and Sunny got into a fight when she heard Sunny smashing his violin before their big recital. If they had both cooled off or if she had let him away, things wouldn't have escalated but Mari wouldn't let Sunny run, not "this time". Sunny pushed her down in a fit of anger, forgetting she was next to the staircase and had a bad knee. She tumbled, crashing on the remains of his violin, and lay still. Sunny believed she was asleep and ran downstairs, begging PleaseWakeUp. He dragged her up and tucked her into bed, and was convinced this was a bad dream, starting to disassociate into White Space. Basil arrived in time to see Mari falling and watched in shock. He ordered Sunny to help him carry Mari's body to the backyard and assembled a nearby jump rope into a noose. Sunny refused to look, believing this was a bad dream. Subconsciously, Omori resented Basil for staging Mari's manslaughter as a suicide, which was why he kept killing Dream Basil.]]
* RunningGag: Throughout the game you'll find inexplicable toilets. Examining them gets you a cup of instant ramen.
* SanitySlippage: [[spoiler:The Hikikomori route. During the real-world sections, Sunny's hallucinations slowly get worse as Omori takes over his mind.]]
** [[spoiler:It also happens with Basil, regardless of which route you take, though if you take the true route, you actually get to see his sanity slippage. In the true route, the already mentally unwell Basil starts to lose his mind even further upon the news that Sunny is moving away from town after just emerging from his house after four years (with the death of his grandmother just making things worse), and regardless of which route you take, the neutral endings end with him [[DrivenToSuicide committing suicide]]. If you confront Basil on the night he kills himself on the true route, Sunny catches Basil in the middle of a psychotic breakdown and attacks Sunny to free him from "Something", implying that he intends to commit a murder-suicide with Sunny, all while Sunny desperately tries to fight off Basil while suffering from a full-on panic attack. Thankfully, the secret ending shows that Basil gets better.]]
* SceneryGorn: [[spoiler:Basil's home in Headspace]] degrades more and more as the game progresses. [[spoiler:The surrounding vegetation starts to either die out or overgrow into his house, which starts to suffer wood rot. By the time you unlock Black Space, the trees surrounding his house have died and lost their leaves, the pond around his house has turned blood red with elongated arms extending out of it, and there's a giant hole in the floor that leads to Black Space.]]
* SchmuckBait:
** During the Prologue when Sunny wakes up in the middle of the night and after eating the steak that gives him a stomachache, you'll hear someone knocking at the door. [[spoiler:Go ahead, answer an unexpected visitor in the middle of the night, and get a JumpScare hallucination for your efforts. Mari isn't there after all.]] [[RewatchBonus It's even more bait-y on a repeat playthrough after a Sunny route playthrough]], since you know that [[spoiler:Mari died years before the start of the game, so you know that what you think is Mari visiting you isn't, but you just ''have'' to wonder about Mari supposedly coming BackFromTheDead…]]
** One of the rooms in Sweetheart's Castle contains a few melons in a prison cell, along with several Rare Bears. A lever that opens the cell is right next to it. If you pull the lever, all of the Rare Bears begin swarming you, forcing you into one fight after another with no chance to fully heal between each encounter.
** In Faraway Park on "TWO DAYS LEFT": "An unassuming beehive. Do you want to disturb it?" If you do, [[ScaryStingingSwarm precisely the expected happens]].
** The container for Marina's 667th experiment has a nearby posted bird sign warning you to not touch the glass. Just try to ignore the warning... As you run down the halls to escape, depending on [[RandomEvent a hidden randomly-picked variable]], [[spoiler:you may encounter the Spelling Bee, who you may remember from the Train Station along with their "slowly spell out their words one letter at a time" VerbalTic. Talk to them ''at your own peril'' and find out the hard way that TalkingIsAFreeAction is averted]].
* ScoldedForNotBuying: Backing out of the shop menu without a purchase or sale irritates the Mailbox, and he says he has no patience for window shoppers.
* ScriptedBattle: Several at various points in the game:
** The very first fight in the game, against Boss, will always end with him [[OneHitKill instantly knocking out every party member except Omori]] as a way to demonstrate the latter's LastChanceHitPoint ability. Boss will not attack any further after this point, making the fight [[ForegoneVictory impossible to lose]].
** Similarly, the fight against Ye Old Sprout is intended as a tutorial for the [[ThePowerOfFriendship Follow-Up]] mechanic, with the battle restarting after a few turns to introduce the Energy meter. A few turns after this, the Energy meter is automatically maxed out, encouraging the player to use the [[LimitBreak Release Energy]] attack to finish the fight (though it is not actually required to do so).
** None of the fights with Something in the Sunny route can be lost[[note]]With one very unlikely exception: if the player allows the Something in the Dark fight to go on for 10 turns, it will use a unique attack dealing [[ArcNumber 143]] damage for a OneHitKill[[/note]], but at the same time, it is impossible to deal damage to Something: the only way to defeat it is to wait out a few turns until Sunny learns a new skill, which can be used to immediately end the battle.
** The encounter with Life Jam Guy in the Junkyard proceeds with him [[OneHitKill immediately knocking out your entire party except for Omori]], similarly to Boss; the battle will then automatically end once you use the Life Jam he gives you to revive your party members. It is also [[HopelessBossFight completely impossible to defeat him]], with the game having multiple fail-safes in place to prevent you from doing so.
** [[ZigZaggingTrope Zig-zagged]] with [[spoiler:[[FinalBoss Humphrey]]. While his first phase can be defeated conventionally, its whopping [[DamageSpongeBoss 9,999 health]] makes it unfeasible to do so without the use of nuking strategies; as such, Humphrey will automatically transition to his second phase after five turns have passed, regardless of whether or not his health is depleted. His second and third phases are then fought normally, but his final phase [[ZeroEffortBoss has only 1 HP and does not attack]], forcing the player to end the fight]].
** The final two fights of the Sunny Route are also heavily scripted:
*** [[spoiler:The fight against Basil prohibits the use of skills: any that you try to use will fail and be removed from the battle menu afterwards. Once Sunny becomes Stressed Out, even skills he hasn't used yet become disabled. Additionally, once either Basil or Sunny reaches a certain HP threshold, Basil will [[EyeScream stab Sunny in the eye]], automatically ending the fight afterwards as both boys black out.]]
*** [[spoiler:[[FinalBoss The final fight against Omori]] is [[HopelessBossFight unwinnable]], with each phase of the fight steadily reducing your options for fighting him. Beginning with his fifth phase, Omori's Erase attack will inflict the Afraid emotion, forcing you to use Calm Down to remove it; after a certain point in the phase, however, Calm Down will be disabled as well, after which point the player is expected to die. If you manage to survive long enough to defeat his fifth phase despite this, Omori's final phase will spam an Erase attack that inflicts Afraid and lowers defense every turn, making it effectively impossible to defeat. The only way to actually defeat Omori is to [[FissionMailed choose to continue on the Game Over screen]], at which point Sunny can play his duet with Mari to finally placate him.]]
* SecretExpandedEpilogue: [[spoiler:Consistently watering Basil's plants in Headspace grants a post-credits cutscene in the game's best ending.]]
* SensoryAbuse: The track "Friends.", which is an alternate version of "Lost At A Sleepover". It starts out normal, but after the 26 second mark the flute makes an extremely loud and corrupted whistle.
* SharkFinOfDoom: {{Parodied|Trope}}. There is an enemy called a Shark Fin that resembles a shark fin ominously sticking out of the water, but the “fin” is actually the entire creature.
* SheatheYourSword: [[spoiler:Omori cannot be beaten with force. The only way for Sunny to defeat him is to accept responsibility for his actions by playing the Final Duet. Downplayed in terms of gameplay though, as you '''do''' still need to strike Omori down enough times for the option to appear after Sunny's initial defeat.]]
* ShiftingSandLand: Orange Oasis is a vast desert.
* ShooOutTheClowns: [[spoiler:Once Omori enters Black Space, all of Headspace is swept aside. The other Headspace kids do appear in Black Space, though as [[GlitchEntity evil, distorted entities]]. The kids then make one last appearance in either the good or bad ending, but don't even have any dialogue.]]
* ShootTheShaggyDog: The [[DownerEnding bad ending]]. [[spoiler:Sunny's character growth and willingness to move on from his dark past is rendered moot as he gives up fighting Omori after being defeated by him and allows him to consume his mind. This leads to the cycle of Sunny burying himself in his fantasies repeating once more… or it would have had he not [[DrivenToSuicide thrown himself off the hospital roof]].]]
* SleepCute: Hero and Mari had several pictures taken of them like this by Basil. Notably, one has Hero laying headfirst on Mari's abdomen while she's only wearing a two-piece swimsuit.
* SlidingScaleOfIdealismVersusCynicism:
** Much of the Faraway segments of the Main Route are somewhat on the idealistic end of the scale, proving the friends' potential to reconcile even after what broke them apart, as well as depicting Sunny and Kel's positive contributions to and fellowship with their immediate community. [[spoiler:While [[VillainHasAPoint Omori is correct]] that how Mari really died is not something the friends will take lightly, how exactly they react is left far too {{ambiguous|ending}} for the [[GoldenEnding good ending]] to lean on either side.]]
** [[spoiler:The Hikikomori Route is not only {{darker|and edgier}} in a {{surreal|horror}}istic fashion, but also the most firmly cynical part of the entire game, lampooning Sunny's attempts to hide his own problems, which prevent him from making peace with them and condemn Basil to death by [[DrivenToSuicide suicide]].]]
* SlidingScaleOfParentShamingInFiction: All of the main friend group's parents are of the Type II "bad parents" sort. [[spoiler:Sunny's father left the family, and]] Sunny's mother has done little to feed him or help him with his depression and anxiety once he isolated himself [[spoiler:after accidentally killing his older sister (whose contributing perfectionism was possibly worsened by their parents). Kel was TheUnfavorite to his parents for his entire life and is still quite curt about it. Kel's older brother Hero was likely also influenced by them to give up his dream of being a professional cook. Aubrey's parents are divorced, and her mother neglected to keep [[HorribleHousing her house]] livable or even attend to her. Somewhat similarly, Basil's parents are too busy to have seen him in a very long time, giving him issues with abandonment.]]
* SoundtrackDissonance: Music/BoEn's "[[https://youtu.be/rM9V99VlgrI My Time]]" from the trailer, or the parts of the song used for it, is a surprisingly jaunty melody for a game that has multiple ContentWarnings about disturbing themes. [[spoiler:[[AvertedTrope Until you reach the point of the game where you hear it]] -- that is, the DownerEnding. One good listen to the lyrics and understanding Sunny's [[DrivenToSuicide position]] in the bad ending, and suddenly the song makes sense on an ''uncanny'' amount of levels, to the point you'd be forgiven for thinking Omocat commissioned it.]]
* SpaceZone: Otherworld takes place on an extraterrestrial planet.
* SplitPersonalityTakeover:
** [[spoiler:In the path to the GoldenEnding, Omori initiates a battle inside Sunny's mind to try and kill himself so he doesn't confront his friends about the AwfulTruth. Whether or not he succeeds is up to the player.]]
** [[spoiler:In the Hikkikomori Route, Omori steps in to take over Sunny's body after saving him from Stranger and Something. Looking into the bathroom mirror from then on out will show Omori's reflection instead of Sunny's.]]
* StaircaseTumble: [[spoiler:Mari accidentally fell down the stairs and died from Sunny's accidental push.]]
* StaticScrew: It is possible to access [[spoiler:Black Space 2]] in the normal route by waiting for a while in [[spoiler:Black Space]] area where Something is declaring its love for Sunny and jumping down the pit towards the right. Via this method, the screen will be covered with static as the player explores the abyss, rendering the area nearly impossible to navigate.
* StatusBuff: In place of StatusEffects, OMORI has an Emotion system. The emotion someone feels will increase one stat, decrease another stat, modifies some of their skills, and has a dash of ElementalRockPaperScissors involved, along with a TierSystem. There are usually two tiers of emotions, though some bosses and (curiously for TheStoic) Omori himself has three.
** '''Happy / Ecstatic / Manic:''' [[CriticalHitClass Increases Luck and Speed, but lowers Hit Rate.]] Increased damage against the Angry line. Happy enemies drop more clams when defeated, and have a higher chance of dropping items.
** '''Sad / Depressed / Miserable:''' [[MightyGlacier Increases Defense and sacrifices some Juice to reduce damage, but lowers Speed.]] Increased damage against the Happy line. Sad enemies become less likely to attack, but drop less EXP and clams upon defeat.
** '''Angry / Enraged / Furious:''' [[GlassCannon Increases Attack, but lowers Defense.]] Increased damage against the Sad line. Angry enemies give more experience points when defeated.
** '''[[PowerNullifier Afraid]][[spoiler: / Stressed Out]]:''' A special status reserved for special battles, usually involving Something. Prevents the use of Follow-Up Attacks and most Skills, and increases damage taken by the above emotions, including itself.
* TheStinger: If the player takes care of Basil's plants throughout the game, [[spoiler:an extra scene plays after the Good Ending in which Sunny and Basil's Somethings vanish from behind them, heavily implying that they have forgiven themselves and are ready to move on]].
* StoryBranching:
** Main Route: The most common route as well as the route with [[MultipleEndings multiple variations of endings]].
** [[spoiler:Hikkikomori Route: An alternative route only possible if you stay home for the Real World events, doing chores as a replacement for all of the events outside.]]
* StylisticSuck:
** Part of the difficulty of the pizza delivery sidequest is that the otherwise clear instructions are written in godawful handwriting.
** This trope pretty much makes up all of the movies in Sweetheart's theater. One of them is just a shitty doodle of Sweetheart with a two-frame move cycle.
* SuddenSoundtrackStop: [[spoiler:Stabbing yourself to exit Black Space will result in the music cutting out instantly once you do.]]
* {{Superboss}}: [[spoiler:Perfectheart's fight is secluded to late in the Hikikomori Route, and she's substantially stronger and hardier than any other Headspace boss, let alone the other Sweetheart clones.]]
* SurprisinglyCreepyMoment:
** The first segment has the friend group rescuing Basil from a rhinoceros-like bully. All seems well, as Basil asks for help with arranging his photo album. Then he sees a dropped photo, studies it, and [[OhCrap freaks out]]. He starts to say something about Mari but we jump-cut to a photograph [[spoiler:of a broken violin (you have to pause it to see it properly)]]. Omori then returns to White Space. The only way to exit is to command him to stab himself. This won't be a totally cutesy RPG...
** Most of the bits in Headspace are fun, where a player can spend time helping out the [=NPC=]s with their problems, and you can use a show of force to persuade some bosses to let you go in peace. Then [[spoiler:Humphrey swallows you alive and you have to deal with him and his own giant taste buds]]. The sequence screams PrimalFear.
** The bad ending has this. [[spoiler:It seems that Omori is going on another adventure in Headspace, committing to his purpose to let Sunny avoid reality completely if you choose to not continue. It's obviously not healthy, but much better than the endings where Sunny stabs himself and bleeds out in bed. Then it cuts to the real world, where an injured Sunny commits suicide by tossing himself off a hospital balcony while possessed by Omori. To emphasize this, the song "My Time" plays, [[DisneyAcidSequence with the visuals changing to accompany the changes in background music]].]]
* SuspiciousVideoGameGenerosity: As a rule of thumb, if you see a picnic basket and a health restoring point, but no Mari, there may be trouble brewing ahead. Examples: the tunnel before the Sweetheart fight, the elevator to Mr. Jawsum's office, just before the corridor leading to the Slime Girls' rooms, just before the boss room in Breaven, in the piano room of the Lost Library ([[spoiler:where you fight the phobia bosses on the Hikkikomori Route]]), and so on.
* SuspiciouslySpecificDenial: "There is nothing here". You get that message for inspecting a seemingly random wall, when everything else doesn't yield even a description box.
** [[spoiler:There ''definitely'' is something there. Sunny is trying really hard to pretend the storage closet, and all the bad memories within, does not exist.]]
** [[spoiler:The same thing happens to Basil's room if you get the ending where he kills himself; the door vanishes the moment Sunny closes it, replaced with the same "nothing here" message.]]
** [[spoiler:Defeating all phobia forms of Something on the Hikkikomori route causes the Omori piano to fade away in the Lost Library. When you return to the real world, you can visit Sunny's music room for once, but the center of the room where the piano should be is empty, even though you can collide with something invisible there. Again, "there is nothing here" if you interact with those tiles.]]
* SymbolicBlood: [[spoiler:Should Basil be seen having died by suicide in his room, Sunny can peek through the door to see Basil's Something splattered on the wall as if it was his blood.]]
* TacticalRockPaperScissors: The Emotion system; Happy characters deal extra damage to Angry enemies, who in turn inflict extra damage to Sad enemies, who themselves inflict extra damage to Happy enemies. Following the triangle in reverse translates to reduced damage (e.g. Happy characters do less damage to Sad targets and so on). Emotions are not permanent, however; items and skills can change Emotions, whether for oneself or for another character (whether friend or foe, although some methods can only be applied to one side or the other but not a choice of either), so part of the basic strategy is manipulating Emotions to set up high-damage attacks and/or to reduce incoming damage.
* TakeThat:
** One of the people you can interact resides in [[TrashOfTheTitans a very messy room]] which he's never left in years, engages in online discourse, is [[PurpleProse pretentiously verbose]], regards an anime character as his "betrothed", and even offers a fedora should you best him in a Clash. So, in other words, a [[BasementDweller stereotypical nerd!]]
** The Ballpit in Last Resort is a small jab at Dashcon 2014, one of the most disastrous fan conventions in UsefulNotes/TheNewTens. Indeed, if Omori and his friends climb in, they just sit motionlessly with an annoyed expression.
** The "Download Window" boss is one to Internet Explorer and its horrid "speed", as the boss takes a few turns to attack the party. Its attack isn't even a proper one -- the damage it does is collateral damage from it crashing and burning!
* TelevisionPortal: Minor character TV Girl lives in one of these. The final reward offered by the recycling machine is the Universal Remote, which allows you to use a few televisions found in Headspace as portals [[spoiler:that lead to parts of Black Space 2. It's notably the only way to access said areas on the main route]].
* ThereAreNoTherapists: It's clear that Sunny is struggling with depression and anxiety that no one is really helping him with. This just makes the lack of therapists in the modern real world even more jarring, as the source of the trauma had a domino effect that shattered Sunny's friend circle and even their families. One halfway-competent therapist or [[SocialServicesDoesNotExist social worker]] would've made things a lot less complicated… [[JustEatGilligan but then there wouldn't be a story]]. In Aubrey's case, this is a JustifiedTrope, as her father left and her mother is neglectful. In Kel's case, his troubles probably went unnoticed as a result of his grief not being as visible as that of the other group members. Meanwhile, Sunny's mom seems to have adopted a pretty laissez-faire attitude about her son's condition, perhaps out of fear of making things worse for him; of course, as we now know, [[spoiler:[[DrivenToSuicide this can prove to be a fatal mistake]]]].
* ThereCanOnlyBeOne: [[spoiler:One scene in Black Space has Omori dream about multiple Aubreys fawning over him while in a locker room, until the last one instigates a fight that leaves all but two of them Toasted. The two then demand which one Omori wants to go out with, but Omori wakes up the instant he chooses one of them.]]
* TheyKilledKennyAgain:
** A recurring NPC named Snaley frequently shows up only to die in a comical manner.
** [[spoiler:A rare [[PlayedForHorror non-humorous]] example occurs in Black Space. Omori rescues Basil multiple times only for him to die in some horrific manner shortly after. This repeats several times in Black Space and is done to keep Basil from spilling the AwfulTruth to Sunny.]]
* TimeLimitBoss: The boss fight against [[spoiler:Something in the Dark during the Hikkikomori route]] must be won within ten turns.
* ToiletHorror: At night, Sunny can look in his bathroom mirror to find Something [[spoiler:or a ghostly Mari]] standing behind him. [[spoiler:On Three Days Left, Basil will have a mental breakdown in the bathroom of his house after learning Sunny is moving away.]]
* TomatoInTheMirror: Omori isn't real [[spoiler:and isn't even a person or avatar; he is a dream manifestation of Sunny's guilt and anger about killing Mari by accident. Needless to say, Omori is very unhappy when this revelation sinks in, because it means that Sunny no longer needs him, and he will have to fade away for Sunny to properly accept his guilt]].
* TomatoSurprise: [[spoiler:Omori is pretty aware of what he is, but the player isn't. In Black Space, he kills Basil whenever the latter tries to communicate something important. On his throne of hands, Omori looks directly at you, revealing that he is the ''antagonist'' of Sunny's story.]]
* TotemPoleTrench: One of the "movies" at the theater in Sweetheart's Castle features sprout moles doing this.
* TrailersAlwaysSpoil:
** The [[https://youtu.be/erzgjfU271g 2014 trailer]] already has Aubrey's [[{{Delinquents}} present Faraway appearance]], a subtle allusion to the game's FirstEpisodeTwist.
** One of the other trailers is this as well, showing [[spoiler:Omori exploring Black Space]], something you won't do until late in the game. Severely {{downplayed|trope}} in that it isn't well-explained and only seems to be part of the game's horror elements, which are used as a selling point.
* UnderTheSea: All regions of Headspace beyond the Deep Well are underwater.
* UnderwaterCity: The Deep Well is surrounded by highways under the sea.
* UnendingEndCard: [[spoiler:Following the good ending sequence is a beige-background screen with a tree stump that has a pinwheel on it, with the screen thanking the player for playing.]]
* UnexpectedGameplayChange: [[spoiler:Once you reach Black Space, the game becomes an atmospheric exploration game in the vein of ''VideoGame/YumeNikki''.]]
* UnexpectedlyRealisticGameplay: One of the major themes about dreams and reality is that life isn't a video game, best shown when most game elements are removed in the waking world.
** Omori fighting in Headspace with a knife isn't much of an issue, but Sunny brandishing a steak knife in the real world causes multiple characters to freak out or be scared. Enough so that even though it's minor, Sunny attacking Aubrey with the knife equipped in their first bout causes a WhatTheHellHero from both sides of the fight. After attacking her, the fight immediately ends due to a real injury.
** Omori and his friends can travel underwater to escape the Last Resort. In the real world, Sunny's visible phobia of drowning, combined with a lack of experience or stamina, literally sinks him when [[spoiler:he has to save Basil after Aubrey pushes him into the lake. Not helping is that he hallucinates fighting Something, and a spectre of Mari teaches Sunny how to power through and Persist to beat it. Hero has to save them both, though he notes that Sunny is just waterlogged while Basil got water in his lungs and needs to get back home to rest and change into dry clothes. A flashback in the good ending reveals that Mari saved him from drowning when he was younger, for similar reasons]]. 
** You can obtain various charms like in Headspace, but because they're not exactly armor, the charms are for mostly for aesthetic value and don't affect your stats [[spoiler:(except for the Seashell Necklace)]]. The Pet Rock is one of the few charms that has an effect, and it only lets you play a minigame with other characters.
** Also, Sunny and friends can certainly buy and eat as many snacks as they want, and [[DownplayedTrope that applies to the real world also]]. However, there's no such thing as HyperactiveMetabolism in the real world: comfort food like pizza certainly makes them feel better, but not as much as actual medicine.
** Quests in Headspace have a lightbulb icon above an [=NPC=]'s head to denote them, with Mari keeping track of them as you go. Reality is less convenient. Neither the NoticeThis trope nor ExpositionFairy trope apply in real life, so you have to keep track of any real world quests yourself.
** CriticalExistenceFailure is in full effect, as characters given a brutal beatdown can still fight if they have enough health left and some are just fine in post-battle cutscenes... in Headspace, anyway. Naturally, the waking world doesn't follow this rule; Sunny and Aubrey only walk away from their fights because Sunny is disarmed or the scuffle is broken up. [[spoiler:The fight between Sunny and Basil is ''not'' broken up, and it ends like a brawl amidst a shared psychotic break would be expected to end: with both boys battered, bloody, and bedridden in the hospital.]]
** [[spoiler:In the Hikikomori route, Omori-as-Sunny wandering around the house can get the Stab option back if he picks up a knife from the kitchen. Done in Headspace, this warps him back to White Space, but [[DrivenToSuicide done in reality...]]]]
** The fight against the Hooligans on the 2nd day is typically a CurbStompBattle, with Kel admitting that it was a bad idea to pick a fight with six people at once. However, there actually is a way to win the fight that's also fairly realistic — [[spoiler:using the pepper spray, which incapacitates all of them]].
* UngratefulBastard: [[spoiler:Omori regards Sunny as this; given the fact that Omori is a manifestation of Sunny's depression and self-loathing about killing his sister by accident, it's understandable. The truth is more complicated than that; Sunny never meant to hurt Mari, let alone kill her, and he lashed out in a MomentOfWeakness. Omori suppressed many happy memories as well as good ones, including the fact that Mari saved Sunny from drowning when they were younger. Sunny still pushed her down the stairs in a fit of anger, after smashing his violin during a fruitless practice before their recital. Omori points out during their boss battle that Mari loved Sunny, and Sunny killed her.]]
* UnnaturallyLoopingLocation: Certain parts of Headspace, such as the Vast Forest and Otherworld, can be travelled through in one cardinal direction and cause the group to travel in circles.
* UnPerson: [[spoiler:Basil towards the end of the regular Headspace portion of the game. It starts with Omori's friends forgetting what he looks like, and by the time they get out of Humphrey, they've completely forgotten about him, and even the quest to find him is straight-up deleted from the quest-log. This is due to Omori's subconscious actively erasing Basil from Headspace due to his connections to the truth. If you're on the Hikikomori route, Omori saves Basil and this trope is undone.]]
* UnreliableNarrator: Both Sunny and Omori are this, and it's an important plot point.
** Omori is introduced as the leader of the friendship group in Headspace, the cool friend that inspires joy in everyone. He takes them on quests and adventures, including one where Basil goes missing. [[spoiler:It comes out that Omori was lying to everyone, including the player: he was the one who removed Basil from Headspace and imprisoned him in Blackspace, as punishment for trying to talk about Mari's death in the real world. What's more, Omori has reset Headspace multiple times, and placed older copies of the friend group in Black Space rooms as well where they deteriorate. He's actually the villain of the story and a coping mechanism for Sunny, to hide from him that Sunny was responsible for Mari's death.]]
** Sunny is the real-world player character, who wanders around the house reading notes from his mother. Each of his phobias appears as the monster Something, muddying the screen and blurring reality. At one point he thinks that he sees Mari outside the house begging to be let inside. Choosing to do so lets you know that whatever was outside definitely wasn't Mari, [[spoiler:in the living sense]]. [[spoiler:Aubrey has to drop the bomb when reminding Kel and Sunny that Mari died four years ago. To reach the good ending, Sunny has to face the fact -- and shocking revelation to the viewers -- that he pushed Mari down the stairs in a fit of anger, and Basil got the idea to stage her death as a suicide. It means uncovering the truth, even when Omori is fighting you every step of the way.]]
* TheUnSmile: Omori, when he gets Ecstatic, sports a huge SlasherSmile from ear to ear and pupil-less eyes. It gets worse when he gets Manic and drool starts dripping out of the side of his mouth.
* UnstoppableRage: [[DownplayedTrope Downplayed]]. During battles, the characters can experience the emotion anger, boosting their attack power, but also lowering defense.
* UnusuallyUninterestingSight: Nearly everything pertaining to Something, such as the Stranger, the bloody footprints that lead to Something/Stranger-related locations, and the [[spoiler:Deeper Well]] [=NPCs=] who address Omori in a collective WhamEpisode, are completely ignored by the rest of his party. [[spoiler:One notable exception that isn't on the Hikkikomori Route is when a Something attacks the party on the train to Orange Oasis, causing the rest of the party to fall into Afraid status while Omori is left Neutral, and even then, nobody has anything to say about it afterwards.]] Justified in that [[spoiler:Omori's Headspace friends are all products of his imagination meant to distract Sunny from learning the truth about Mari's death, so it's likely he intentionally "designed" them to ignore everything Something-related]].we
* UnwinnableByDesign: The quest [[spoiler:"Basil"]] is purposely unwinnable, as [[spoiler:it will eventually be replaced with the "Empty House" quest by the time you reach Deep Well and Deeper Well. This is due to the fact that Omori ''wants'' Headspace Basil not to be found, and Sunny's suppression of the truth gets so bad that Basil starts to disappear from Headspace, with everyone forgetting he even existed]].
* UnwittingInstigatorOfDoom: Zigzagged with Aubrey, regarding how she treats Basil in the real world. On the one hand, her bullying him definitely didn't help, and she [[MyGodWhatHaveIDone crumbles]] [[spoiler:after nearly drowning him in a fit of rage, and later if he succeeds in killing himself. The Hikkikomori route, however, implies that Basil would have been suicidal with or without her actions]].
* UseYourHead:
** A minor character named Berly is really proud of her headbutt skills, which she uses to play tetherball. Contrary to the expectations, she doesn't actually fight even when she formally "joins the party", and just tags along instead. However, she then teaches headbutting to Aubrey once you find her lost tetherball, and she gives you all a "Butt Certificate" to mark the occasion as well. [[spoiler:Kel then sticks it on a flagpole to mark them getting to the otherworld, in spite of Aubrey's protests.]]
** The real-world Aubrey won't hesitate to use the same headbutt on Sunny and Kel when she fights them.
* TheVeryDefinitelyFinalDungeon: The place where Basil is being held captive; [[spoiler:Black Space, a ''VideoGame/YumeNikki''-esque area with a nexus with multiple doors leading to several nightmarish areas — you must go through a little more than half of them to be able to reach the Church of Something and the game's endings. Unusually, you reach this area ''after'' fighting the standard FinalBoss, Humphrey]].
* VideoGameCaringPotential:
** Watering Dream Basil's Headspace plants will earn you a bonus scene in the good ending, where [[spoiler:both of their Somethings fade away as Sunny smiles at a waking Basil, indicating that they are free from their DarkSecret's burden]].
** You can also do sidequests around town, helping people with their problems. It also helps mend Hero and Kel's bond, [[spoiler:and everyone you assist sends flowers in the good ending, wishing you a speedy recovery]].
* VideogameCrueltyPotential:
** PlayedForLaughs. One of the Sprout Moles in Sprout Mole Village has a Christmas tree in their home. Cutting down the tree gives you an achievement for ruining Christmas. What makes this even funnier is that the game was released on Christmas Day.
** [[spoiler:Killing Abbi after her boss fight will give you her eye as an accessory, but you will lose a bunch of items in the process.]]
** You can continue throwing balls at Scarethrow even after he tells you to stop. The following conversation becomes more and more depressing as you continue to do so.
** There is an optional area called "Rain Town", which is rained on a bit too hard. There, you get a sidequest where you turn a valve to lighten the rain for a reward, or if you turn it the wrong way, you can intensify the rain to wash the town away, presumably killing all of its residents. Flooding Rain Town will mark the quest as complete, but you get no reward. It also renders the town inaccessible if you're not on the Hikikomori route.
** [[spoiler:In one of the rooms in Black Space, Mewo is strapped to a table with the cat butler from Omori's sketch book telling Omori that Mewo's been a "very bad cat". Omori has the option to cut open Mewo, while the game describes in painful detail how afraid Mewo is. There's no reason to kill Mewo unless the player is under the false pretense that she needs to be killed to leave the room, when in reality Omori has to stab himself to exit.]]
* VisualPun:
** When party members fall in battle, they're toast. By that, we mean that they will morph into a literal slice of toasted bread, retaining only what they wore on their head (like Aubrey's ribbon).
** One of the common enemies you fight in Otherworld is a wormhole. A worm coming out of a literal wormhole.
** The Doombox sprite is on fire. Perhaps because the music it was playing was fire.
** The "P" key [[ToiletHumor is found in a toilet]].
** Similarly, the treasure map in Orange Oasis cheerfully tells you that XMarksTheSpot; the buried treasure marked on it is indeed the "X" key.
** Dino's Dig has four floors: the lowest is full of wheat and bread, the second covered in grass and veggies, the third floor has a meat theme, and the top of the building is made of cake. The LevelAte's pyramid is quite literally the food pyramid.
** [[spoiler:Sunny's late game trip down memory lane is done through an actual lane. Saving there shows the place is legit called Memory Lane.]]
** [[spoiler:The Keyboard Keycaps that you picked up to unlock Black Space are shown to be ''literal'' keys, the kind that unlock doors. Also played with, during some of the dialogue during your trip back to Neighbor's Room from where you fought Humphrey, where a voice tells you the 'KEYS to the other realm are different each time but each will unlock the same door'.]]
* WakeUpCallBoss: Space Ex-Boyfriend is the first big challenge the player will meet at the beginning of the game. If you haven't understood how the Emotion System and Follow-Up works, get ready to see your party members toasted.
* WaterIsAir: Most Headspace characters, when deep underwater, move around as if they are on land.
* WeCannotGoOnWithoutYou: No matter who else in your party is still alive, as soon as Omori gets KO'd, it's GameOver. The game makes up for this by allowing Omori to survive a fatal attack once per battle. [[spoiler:Justified, as Omori actually controls Headspace, so without him, there wouldn't be any Headspace.]]
* WelcomeToCorneria: Characters usually have only line (or at most, several lines said all at once) when talked to, until a plot event happens and it's switched for another set of lines.
* WhamEpisode:
** The end of the tutorial section: Basil freaks out after a photo of some unknown broken object falls from his album, causing black tendrils to appear below him and Omori to be kicked back to White Space. With no way out, Omori stabs himself. [[DreamEmergencyExit Cut to the]] ''[[DreamEmergencyExit real world]]'', where the player is introduced to Sunny, a boy who looks way too similar to Omori.
** The first day throws said real world into the mix, and apparently, not only has Aubrey grown into a punk, [[spoiler:the other girl in Headspace, Mari, [[DeadAllAlong has been dead for four years]], and [[WeUsedToBeFriends everyone in your circle no longer talks to each other anymore]]]]. Also, you have only three days left before you move out of town.
** [[spoiler:''Welcome To Black Space.'' In this ''VideoGame/YumeNikki''/''VideoGame/DotFlow''-inspired section, it's revealed that not only are Sunny and Omori two different people ([[SplitPersonality sort of]]), but the horrifying truth of Mari's death is revealed; an argument between the two ends with Sunny pushing her down a flight of stairs, killing her. Basil, the only witness to this and [[GoodCannotComprehendEvil incapable of realizing that Sunny could do such a thing]], comes up with the plan to make Mari's death a suicide to make Sunny innocent, but the shared guilt and trauma of Mari's open eye staring at them creates the [[BigBad Something]] that haunts them both, as well as Omori, who represents Sunny's violent repression of said truth and suicidal guilt. With this revealed, Omori becomes the main antagonist and tries to take over Sunny and [[DrivenToSuicide kill himself out of grief]] on the last day before they move out.]]
* WhamLine:
** From the Prologue, right after you complete the tutorial section:
--->You see a boy sleeping in his room. What's his name?\\
[[HelloInsertNameHere Sunny]]
** During the first Sunny section in Day 1 of the Main Route:
--->'''Kel:''' You know, Mari would be really sad to hear that.\\
'''Aubrey:''' [[spoiler:Heh... Really? You really wanna bring Mari into this? Who cares what Mari thinks? Mari's [[DeadAllAlong dead]].]]
** And shortly after that...
--->'''Aubrey:''' [[WeUsedToBeFriends We haven't talked in four years, Kel. A lot changes in four years.]]
** Day 2, during the Headspace section:
--->'''Mari:''' It's not my place to say anymore, but... I hope you're still there... [[spoiler:Sunny...]]
** The Hangman's answer:
--->[[spoiler:Welcome to Black Space]]
** Right before Day 2 ends, [[spoiler:after you meet with Mari in the Piano Room. You think it's another one of Sunny's hallucinations, but...]]
--->'''Hero:''' [[spoiler:Whoa, you scared me there, Sunny! Sorry for bursting in like that. [[MaybeMagicMaybeMundane I could've sworn I heard some music.]]]]
** And then we get confirmation [[spoiler:on how Mari died. At least before TheReveal]]:
--->'''Hero:''' [[spoiler:I just... don't understand why she chose to leave us... [[DrivenToSuicide the way she did.]]]]
** A line from Basil near the end of the game:
--->'''Basil:''' [[spoiler:when something blacked out all of my photos...]]
** A line that explains a lot in [[spoiler:Black Space: This line explains why the StableTimeLoop that Sunny's dreams are going through is different during the events of the game than any of the previous cycles. Everything was stable until Mom said this line to Sunny, shattering his stable loop and turning his world upside down (the Stranger in that room tells you that 'something made the truth slip'):]]
--->'''Mom:''' [[spoiler:SUNNY ... we're moving away.]]
* WhamShot: When [[spoiler:Sunny enters Black Space, he has to do a FetchQuest to find what look like missing photos from Dream Basil's album during One Day Left. To do so, he has to navigate through hospital rooms, with bloody hands flashing as he picks up each one. They confirm that Mari fell down the stairs, which doesn't match with the fact that she was found hanging from a tree. Then we get to one photo: it shows Sunny and Mari at the top of the stairs. Slowly the player comes to the realization that Sunny killed Mari by accident]].
* WhereItAllBegan: [[spoiler:Black Space is hidden under Basil's house, which is right next to the starting area and the first major landmark you'll encounter. This one gets brought up in-story: the voice in the Deeper Well points out that the truth changes locations every time the adventure restarts, and that it spawned so ''absurdly'' close to White Space means that Sunny won't be able to keep lying to himself for much longer.]]
** [[spoiler:The final battle between Sunny and Omori takes place in White Space, the very first area of the game and the place where Omori came to be.]]
* WimpFight: Almost all the fights in Faraway Town are this. The hardest hitter on your team for most of the game is Kel, who's just throwing a regular ball at people. Even if you lose, there is no indication that any lasting damage was done. To drive the point home, the battle music used is [[https://youtu.be/tnyNKmndmRg the same from the very first fight in the game]].
* WingdingEyes: Combat encounters briefly replace the enemies' eyes with crosses whenever they get hit (demo only).
* WolfpackBoss: [[spoiler:The console version adds extra battles to the end of the Boss Rush if you take it on with only Basil in your party. One of these battles is a fight with projections of Kel, Aubrey, and Hero. Unlike the Slime Girls, they will take their actions individually and will use the same skills they had as party members on you.]]
* WombLevel: The Slime Girls' lair is entirely within the mouth of Humphrey the Whale.
* WondrousLadiesRoom: The men's room in the Last Resort is your average grimy public restroom. The women's room, on the other hand, is a perfectly clean restroom with decorated walls, potted plants, and a makeup station.
* WorldOfChaos:
** The world of Headspace is a very ''strange'' place, featuring all sorts of quirky characters and a variety of environments, ranging from outer space to a desert made of food. [[spoiler:As it should be: it's the delusion of a child ''desperately'' trying to distract himself from his own suicidal depression. The reason Headspace's denizens and locations don't make a lick of sense is because Sunny's subconscious is literally making it up as he goes along to distract him from confronting his trauma. This even justifies the Hikikomori route's extra content, as Sunny has nothing better to do than keep expanding on the world in his dreams, while in the True Route, Sunny reconnecting with his friends and spending time in reality causes all of the Headspace shenanigans to [[ShooOutTheClowns abruptly make an exit]].]]
** [[spoiler:Black Space is the product of all of Sunny’s repressed trauma and memories. As a result, it’s even more chaotic then Headspace, containing all sorts of disturbing, surreal, and broken worlds.]]
* YearX: A very subtle example. The game is very vague about what the exact year and date is in ''Omori'', with context clues hinting that it takes place in the mid-2000s at the latest to the late 90s at the earliest. One of the biggest hints is when [[spoiler:Hero is promoted to CEO of the Last Resort, where his timeframe of owning it is 199X, hinting that, at least in Headspace, the year is set around the 90s.]]
* YellowSnow: The Frozen Lake sub-area of Otherworld contains a small patch of yellow-colored snow.
* YouBastard: The console-exclusive version of the BossRush in the [[spoiler:Hikkikomori route]] is topped off with [[spoiler:a [[ZeroEffortBoss "fight"]] against Mari, or a projection thereof]]. [[spoiler:[[WhyIsntItAttacking Mari does nothing to harm Omori and Basil and in fact heals them every so often]]. Your "reward" for beating her is Sunny and Basil being suddenly faced with her hanging corpse, too terrified to move, followed by a JumpScare of a Mari-like apparition charging the screen, as if the game is taunting you for expecting a reward out of killing Sunny's harmless and beloved sister.]]
* YouShouldntKnowThisAlready: Even if you know the password for Sweetheart's Statue beforehand, the correct answers will not appear as options until the four guards tell you what they are.
* ZeroEffortBoss:
** Sunny's fights against Something's alternate forms in the Main Route cannot be lost, no matter how much you make him dawdle on facing his fears.
*** [[spoiler:[[AvertedTrope The very first one]] [[TimeLimitBoss can be lost]]: if you do not Calm Down within 10 turns, you will take 143 damage and get the Game Over screen.]]
** The BossRush exclusive to the [[spoiler:Hikkikomori route]] features two more:
*** Life Jam Guy, who doesn't attack (unlike his original appearance in Otherworld) and just gives you a few Life Jams before leaving, allowing the player to recover before the next actual battle.
*** PlayedForDrama and [[PlayedForHorror Horror]] in the console-exclusive [[spoiler:Mari "battle". Mari doesn't attack at all, and just either smiles at Omori and Basil or even heals them. Once her health is depleted, [[MoodWhiplash she suddenly turns into Something In The Wind (her hanging corpse)]] and Sunny (forced out of Omori) and Basil become Afraid and unable to act. After a few turns of neither party acting, Something turns into a ghostly apparition of her and [[JumpScare charges the screen]] and the Boss Rush ends. The fight represents Sunny's failure to repress his memories of Mari and his AccidentalMurder of her and his and Basil's subsequent staging of her murder as a suicide]].
[[/folder]]
----
->''Waiting for something to happen?''