With a soundtrack of over 179 tracks composed by such artists as Pedro Silva, Jami Lynne, and bo en, the soundtrack of OMORI is one of the best in any indie game.
Let's put it this way: Omori's soundtrack is so incredible that, much like Undertale, Final Fantasy, and The Legend of Zelda, it got its own orchestral performance
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Unmarked spoilers ahead!
- "Title" is a simple piano piece and the first thing you hear when you start up the game. It easily establishes that OMORI will be an emotional game.
Dream Overworld
- "WHITE SPACE", the first theme heard in the game, is only three notes, yet seems to carry a weight of both comfort and sinisterness to it.
- The basic version of "Lost at a Sleepover" is a short but sweet piece that emphasizes childlike wonder. The version that was played at the third anniversary concert, however, is downright gorgeous, with added measures of music and a more natural sound that really gives the song an added little something.
- "By Your Side.", Mari's Leitmotif, is a calm, welcoming piano piece, befitting the safety of a healing and save point.
- "Welcome Again." is one hell of a Dark Reprise of "WHITE SPACE", swapping out the electronic-sounding notes for horrific, unsettling bells. Guaranteed to put you on edge whenever you return to the hub of BLACK SPACE.
Faraway Overworld
- "Finding Shapes In The Clouds" has to be one of the most joyful, happy, playful-sounding 'field' themes ever heard in a JRPG. But then, if one thinks about it, this is the first time in four years Sunny stepped out of his house and had an actual friend to hang out with, and this song is likely what is going on in his mind.
- "See You Tomorrow" is a relaxing and nostalgic acoustic guitar piece that plays during in Faraway Town in the evening, signifying the end of a long day and some peace after any troubles that may have occurred earlier.
- "Dear Little Brother..." is a somber reprise of Mari's leitmotif, fitting Sunny's remembrance of her rescue of him from drowning in the lake.
Battle Themes
- "Tussle Among Trees" is an adorable track that kicks off the simplistic encounters of the Vast Forest.
- Something's three themes combine their shared simple melody with various sound effects to turn them into the musical form of the phobias they represent. "Acrophobia" has repeated sliding tones punctuated with abrupt cuts to give the feeling of falling and impacting the ground, "Arachnophobia" keeps a low crackling sound to represent the chittering of bugs, and "Thalassophobia" muffles itself with swirling sounds to replicate the feeling of being submerged without a way out.
- "Three Bar Logos" is an amazing battle theme to follow up "Tussle Among Trees". It sets up the wacky and fun vibe of Otherworld perfectly with a fast-paced beat as you smash floating oranges out of the sky.
- "Flouring with You" is an upbeat track uses a soundfont very similar to what you get from Touhou Project. You'll notice when the ZUNpets kick in as Life Jam Guy toasts your party in one hit.
- "CHAOS ASSEMBLY" is a fantastic robotic-sounding track that feels too great for a fight against a Download Window.
- "You Were Wrong. Go Back.", a fitting theme for Space Boyfriend. This high-tech tune is perfect for letting the Genre Savvy player know that they shouldn't idly mess with this guy.
- "It Means Everything." When all your pent up anger and sadness reaches a boiling point, and your ex-friend confronts you in your one safe place, and you can't hold back the violent impulses anymore. The 3rd anniversary concert version is played with "Just Leave Me Alone" and "Cram It, Wad", giving the entire song an even more angry feel befitting the buildup.
- "Sweet Paralysis", perhaps a pun on sleep paralysis, is creepy and tense theme that plays against the two Kings: Crawler and Carnivore.
- "Splintered Sweets in the Castle" is a stalwart track that fits the typical shenanigans of Sweetheart's Castle.
- "World's End Valentine", an intense theme that plays during the battle against Sweetheart and is about as obnoxiously manic as Sweetheart herself. Certainly takes the sting out of how difficult the fight is. The 3rd anniversary concert version has all the excellent parts of the original, albeit now with a few amazing solos mixed into it.
- "Swirly 1000x" starts playing in high gear to remind you that you're heavily outnumbered and are in for a rough time.
- "BREADY STEADY GO", the Unbread Twins' intense battle theme, perfectly matches their profession.
- "GOLDENVENGEANCE" builds up as Pluto's expanded form slowly enters the scene, and its main melody kicks in when you gain control of the battle interface. This showdown for the freedom of your party from Mr. Jawsum is on.
- Similar to "GOLDENVENGEANCE", "Underwater Prom Queens" has a calm, mystical-sounding intro as it pans over close-ups of the three Slime Girls... then the beat drops as soon as you get to the battle interface and you know the Slime Girls mean business, and they've got enough tricks to keep you on your toes.
- "You Cannot Go Back", which plays against Space Ex-Husband in the Hikkikomori route, is a more sinister remix of "You Were Wrong. Go Back.", complete with a Dark Reprise of his mixtape.
- "Tee-hee Time", the theme for Perfectheart, is as wild as that of her clone Sweetheart, but it throws in electronic tones that don't sound out of place in an extremely hard arcade Rhythm Game, and goes perfectly well with her status as a superboss.
- "Fight Your Friends" is a playful chaotic mixture of several previous tracks, between "Splintered Sweets in the Castle", "Tussle Among Trees", and even "My Time". It even uses airhorns to good effect! Although it's one of the trickiest fights in the game, it feels more like a silly play-fight among friends.
Finale Soundtracks
- "Your Catastrophes - Procession", the theme for the second phase of the Basil fight. The haunting bells in the piece take an already spooky theme and dials it up to 11, making this theme feel right at home in a Castlevania game. Fitting as Sunny suffers a nervous breakdown and brutally fights back against Basil.
- "Crossroads", a somber piano reprise of "See You Tomorrow", plays as Sunny awakens in Memory Lane and starts on the path to accept the truth.
- "OMORI", the Final Boss theme. Perfect Sad Battle Music. If OMOCAT wanted to portray the tragedy of fighting a losing battle against the personification of your suicidal ideation through music, then OMORI succeeds with flying colors. The 3rd anniversary concert version has an even more emotional violin leading the piece, and the massive amount of supporting strings give it a truly epic feel. It also flawlessly transitions into the below-mentioned "ALTER".
- "OMORI - ALTER", an alteration of "OMORI". It suddenly kicks in without warning the first time Omori inflicts the Afraid status on you. It features "OMORI" in the background being drowned out by chaotic noise as Sunny desperately but hopelessly tries to hold onto himself while Omori gets stronger and stronger. The 3rd anniversary concert version (included with the aforementioned "OMORI") even keeps the background sound effects while adding in a piano and a truly dramatic finale.
- bo en's "My Time" progressively descends into hell. First heard in the 2014 trailer, it plays during the bad ending where Sunny/Omori dies by suicide.
- "DUET", the title theme's Triumphant Reprise, plays after Sunny defeats Omori and can play the recital with Mari that never got to happen in real life, and is a beautiful violin and piano duet that is equal parts heart-warming and tragic for what it represents. For the characters and the player, this piece is catharsis and closure all rolled into one. The 3rd anniversary concert version is everything that the original was, albeit with the added benefit of truly sounding like it was being played in a recital hall. Basically, the concert version is what their duet would have truly sounded like in-person.
- "Clean Slate" plays after Sunny awakens in the hospital after defeating Omori. Its ethereal-sounding tones greatly convey the feeling of the dust settling after the story's climax, and that Sunny's ready to start over on a clean slate at the end of this journey.
- "Good Morning", the credits theme for the Good Ending, is a wonderfully calming track that emphasizes that for Sunny, it's time to make a fresh start in life.
