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As a Fridge subpage, all spoilers are unmarked as per policy. You Have Been Warned.

Fridge Brilliance

  • At first, it appears as though the name "Kris" was chosen to make the protagonist gender-neutral again... but then you reach the ending, and it hits you that there's something else called a "kris" in real life: an Indonesian dagger, sometimes known, particularly in other video games, as a KRIS KNIFE. In a way, they're just another weapon to be used by whatever it is possessed them at the end (the Anomaly, Chara, just themselves, or something else entirely).
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  • How else does Deltarune prove itself to be the opposite of Undertale's "your choices matter"? Their titles! Undertale's name on the title screen is written in all capital letters, but Deltarune is in lowercase.
  • In Undertale, after a True Pacifist run, one could find in Sans' secret room a drawing that's described as three smiling people and the words "don't forget". Before Deltarune's release, a common fan theory speculated that the drawing referenced Gaster, Papyrus, and Sans, but there's a good chance now that this drawing actually depicts Kris, Susie, and Ralsei — making this a cleverly-hidden piece of Production Foreshadowing all along.
    • The theme of Deltarune has the phrase "don't forget" as Arc Words, with a party of three heroes, and Kris gets to talk with Sans personally. We also know that Toby Fox has been working on Deltarune's story concepts as far back as 2012, to the point that it may even predate Undertale.
    • In Undertale, it's only after one speaks to Clam Girl, a rare NPC who resides in Waterfall, that the drawing appears in Sans' secret room. In dialogue, Clam Girl mentions a neighbor's daughter who looks about the player's age, named "Suzy", and that she thinks they should be friends. The name "Suzy" is highlighted yellow. This implies that the drawing is likely tied to Suzy in some way, and that "Suzy" from Undertale is perhaps a parallel to "Susie" from Deltarune.
      • In the Nintendo Switch Undertale release, Clam Girl's dialogue is changed. She explains how the time the player will meet her neighbor's daughter is fast approaching (before her sprite becomes greyscale and disappears). A little over a month later, Deltarune was released. This all but confirms the connection between "Suzy", Susie, and the drawing.
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  • The Playing Card Motifs of The King of Card Castle are Spades. The Ace of Spades is also known as the death card, fitting for someone whose goal is the death of the Lighteners.
  • Speaking of Motifs, most of the main enemies' use of playing cards should call to mind Alice in Wonderland, especially given the long fall you take into their realm (the series recurring element) and Seam's presence as the Cheshire Cat. But according to Jevil and the King of Spades, the Queen and the Knight, who are the likely Big Bad and The Dragon, use Chess Motifs instead like some of the minor enemies. Through the Looking-Glass used chess motifs for contrast with Alice, and given the Alternate Universe setting...
    • Speaking of the Queen, if she also happens to be the Queen of Spades (which is a distinct possibility), a certain song by Styx should immediately come to mind... "Beware of the Queen of Spades" indeed.
  • Why are the Dark World inhabitants afraid of the Queen and the Knight? Alluding to the Chess Motifs, the Queen piece is a Game-Breaker, while the Knight piece is a Mechanically Unusual Fighter.
  • Lancer rides a bike. A bicycle. He has a playing card motif. Bicycle. Playing cards. Bicycle is a popular brand of playing cards.
  • Ralsei's tutorial is essentially a mirror image of the "tutorial" Flowey gave you in Undertale, right down to using some of the exact same language when describing your SOUL. This makes sense when you realize that, based on the ending, Ralsei is almost certainly an alternate version of Asriel and therefore Flowey.
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  • The Hathy enemies, based on hearts, do not speak. Instead, a second-person narrative text describes exactly what they're doing or how they're feeling, much like how the protagonists of both Undertale and Deltarune (both heavily associated with heart shapes) tend to interact with the world.
  • Checking Kris' equipment before they fall into the Darkner's kingdom shows they have a pencil equipped as a weapon. What's the flavor text on the wooden sword they start with after falling? "A wooden practice sword with a carbon-reinforced core."
    • Additionally, if you have the Spookysword equipped when you return from the Dark World, it becomes the Halloween Pencil.
  • Another thing relating to the general "choices don't matter" theme going on: when you die, instead of simply dropping you back at the SAVE point like in Undertale, in Deltarune you go from when you last saved with anything since that save never happening; what you did before you died didn't matter, so why keep it?
    • The only exception to this is Jevil, who immediately cuts to his opening attack. This makes sense, since he's a Fourth-Wall Observer, of all the characters in the game, he'd be the one aware of deaths and resets.
  • Why is the K.Round at the end given a crown? Due to the fact that it's at the end of the checker board, so it got kinged.
    • K.Round. Kround. Crowned.
  • Susie is actually right; your choices don't really matter. The game railroads you at almost every turn, save for a few small details. This is made clear as early as the intro sequence. Notably, the only major detractor from her perspective ends up making another horrible judgement call that nearly gets you killed; Ralsei, when he heals King back up to full health.
  • In the battle against Susie and Lancer, you can temporarily knock her out by emptying her HP bar. After a few turns, however, she gets right back up with low health. This is because whenever Kris, Ralsei, or Susie fall in battle when all three of them are playable, they slowly recover HP until — guess what? — they get right back up!
  • The prophecy that is mentioned near the beginning of the game mentions "a human, a monster and a Prince of the Dark". It seems pretty obvious that the human is Kris and the monster is Susie. But there are actually two Princes in this game: Ralsei...and Lancer. Both are a "Prince of the Dark" and both help you get to the fountain.
    • This actually brings an element of Fridge Horror into the mix. The prophecy mentioned -A- Prince of the Dark, not multiple. And we can tell that Lancer is, in fact, a Prince thanks to his father, who is a King. But the only proof that Ralsei is a Prince is...him saying he's a Prince. Nobody else in the game mentions it, not even a rival King and his son. Did Ralsei lie to us about who he was? If so, why?
      • However, if he's actually a counterpart for Undertale's Asriel, he'd be an actual Prince. The monsters lived in the dark, too, so he'd be a Prince of Darkness alright.
      • Ralsei's dialogue seems to suggest that he hasn't ever actually met anyone before meeting Kris and Susie, despite being a supposed prince, and his castle appears to be outside the actual kingdom. Furthermore, you never actually go inside his castle or any of the empty buildings in the town, so they could possibly just be a facade.
  • The Choco Diamond heals each party member different amounts. Out of combat, Susie is only healed 20HP while Ralsei is healed 50, and during combat it heals them both by only 30. Kris however is healed 80 HP, both in and out of combat. The reason: Kris loves chocolate, so much so that Toriel keeps the chocolate that she bought from Sans locked in her room to prevent Kris from stealing it.
    • Inversely, they hate jelly donuts. The Hearts Donut heals them 20HP out of combat, and in combat it only heals 10. Susie on the other hand loves it, healing her 80HP out of combat, and 90 in combat! This could be taken as foreshadowing that Kris hates the heart-shaped SOUL that's pulling them around.
    • Susie loving the Heart Donut the most also has two reasons; much like her, it has a thick(ish, it's still bread) outside and a soft and gooey inside, much like how Susie herself acts mean and offensive but has a sweet spot deep down. The second is that, well, it's a heart-shaped pastry full of red stuff, her tearing into it would let her act like she's being brutal "savaging" a candy heart and making a mess of its jelly "blood" (say you couldn't imagine her letting red jelly drip from her chin to scare her classmates), the consistency of the jelly being described as "thick and clotty" would only further enhance the image in the regard of making it look... disturbing to eat.
      • Three reasons. It's in game name is the "Hearts Donut", when viewed from the battle screen. This is likely a reference to a joke, "Want a Hearts Donut?" "Ok" (First person hits the second) "Hurts, don't it?", fitting her aggressive personality.
  • The entire Dark World seen in Chapter 1 and its inhabitants correspond to various scattered toys in an abandoned classroom. What object from the storage room was Ralsei an incarnation of, then? You might remember the box of crayons from the beginning that's conspiciously missing a green one. Add to that the pair of red horns Toriel mentions Kris used to own and voilà.
  • A number of characters use noticeably stronger language far more often than anyone in Undertale did for the entire duration of the game: as stated by the characters in the original, they're making a point to tone down their language because Frisk is a young child, while Kris is a teen.
  • K. Round's attacks make heavy use of its legs and involve a lot of jumping at you. In checkers, you capture the opponent's pieces by jumping over them.
  • Jevil seems to use the word 'Chaos' at random. At first it seems like he's just crazy,but judging by context it seems to be how he refers to his attacks. One of his in-combat lines is 'Please, it's just a simple chaos.' This is most likely him attempting to call his attack simple, (which they usually are, if hard to dodge)trying to be modest.
  • Jevil considers himself free even though he's in a jail cell. Considering the card motifs, it's FreeCell!
  • The alterations to numbers in this game has a few reasons for it. Assuming that the rules remain the same with EXP, LOVE, and Killing Intent, the difference in cast explains why the party has more HP but also takes more damage. Frisk in Undertale was a child, an innocent one if you stick to the pacifist path, so enemies would be less willing to do them harm. Inversely, Kris and friends are mid-late teens, not only are they more world-wise and willing to fight back (resulting in more HP), but the enemies also do more damage because they're less willing to hold back against Lightners that are nearly adults. Ralsei, as the most pacifistic (and maybe the youngest), also has the least HP for the same reason.
  • Alphys in Deltarune leaves an anonymous review declaring Mew Mew Kissy Cutie 2 an Even Better Sequel despite her Undertale counterpart thrashing it. While one could argue this incarnation of her may have somewhat different tastes to her Undertale self, it's just as likely Mew Mew Kissy Cutie 2 in the Deltarune universe may be different from its UT counterpart. So as far as we know, it could very well be precisely as good as this Alphys says it is.
  • Walking through spikes is easy when your body is made up of magic, and not flesh and bone like humans and Darkeners (heavily implied).
  • "Hometown" doesn't sound like a very creative name for a First Town now, does it? Then again, so isn't Asgore.
  • "Then the world is covered in darkness." Might be a sneaky reference to the fact that Susie and Kris were actually seemingly in a room with the lights on.
  • Kris' sword is likely a combination of their pencil and knife, as knives have blades.
  • Why are the monster on the Surface instead of in the Underground? Because the previous game was a tale... that took place Underground. Likewise, this might explain why the red bunker is locked.
  • As noted in the Fridge Logic page for Undertale, "Delta Rune is referred to by monsters as a symbol whose meaning has been forgotten — all they can remember is that an angel will save everyone, or it will kill everyone. Regardless of the outcome, the Underground would never be the same... and in some forms of scientific terminology, "delta" is used as an indicator of change." Your choices don't matter because the whole game is an actual story in the world of Undertale with an ambiguous ending that is separated by chapters! This gives another explanation as to why Toby Fox said that Deltarune doesn't effect the world of Undertale.
  • Susie’s magic attack is called the rude buster. In undertale, we learn that the acronyms stand for things like “level of violence” and so on, implying that humans (and possibly monsters) attack using their apathy. Susie is defeating the enemies in deltarune the only way she knows how.
  • According to Ralsei and the King, Lightners and Darkners once lived in harmony until the Darkners were locked away in a sealed realm without purpose, driving the King in particular to bitterness and rage at their betrayal. Ralsei also says that the Darkners' purpose is to assist Lightners, and that this is the only way they can be truly fulfilled. Recall that Susie and Kris access the Dark World through a dusty, unused classroom filled with toys which clearly have not been played with in a long time, and that all of the Darkners are based on toys. This isn't just random lore - it's how toys would feel about being played with and then tossed aside once people get tired of them.
  • A minor one, Susie often mentions that she's feeling hungry despite getting something to eat now and then during the journey. This might be because she likely grew up on the surface and is used to "human food" alongside monster food. Eating only monster food which is almost entirely made of magic simply isn't as filling.

Fridge Horror

  • The birdcage that your SOUL gets flung into looks already worn out and stained by the time the game starts. Just how many times has this happened?
  • Many people assume Kris is being possessed by some malevolent entity (Chara, for instance), turned evil by the player's attempted Genocide run and either completing it or aborting it half-way through. However, the ending remains the same, regardless of if you have Undertale installed on whatever you're playing on, or when the copy that is installed has only ever seen you attempt a Pacifist or Neutral run. So, if the being possessing Kris is Chara, what happened to them that made them so murderous? And if it isn't Chara, then what the hell IS it?!
    • If you talk to Sans about Toriel, he'll say that Toriel came in during the day to buy all the chocolate kisses. He also mentions that she's going to hide them from Kris, because Kris would eat them all. You know who else likes chocolate? Chara.
    • Even prior to the Genocide run, Chara did attempt to murder six people and may or may not have wanted to kill more once they had all their SOULs. If the latter is the case, there's nothing unusual going on here at all, not that that's much of a reassurance.
    • Chara described themselves in the Genocide ending as an embodiment of those mechanics in RPGs that allow you to be violent. The game already had those mechanics, and our decision to use them has no bearing. How can we hope to outrun them when they are already here?
    • There's also every possibility that Kris wasn't being possessed by anything; everyone around the town acts like Kris under the player's control is being more social and generally more out of character than normal. What if a monstrous sociopath really is the "true" Kris and them ripping out the SOUL and behaving like Chara was them resuming their true personality, and not another presence stealing them from us?
      • True, but if they were a sociopath with a soul (meaning Kris's sociopathy not being the result of soullessness but of "normal" human condition), then Kris technically had TWO SOULs, ours and their own.
      • The damaged birdcage indicates that Kris does this regularly, even prior to the player taking control, so it seems the player is not the SOUL itself, but is controlling Kris's SOUL from without. Kris's antisocial behavior may be due to knowing (or suspecting) that something is dangerously wrong with them.
    • Remember, in Deltarune everyone looks the same but has a somewhat changed "role" (Toriel - guardian/teacher, Alphys - scientist/teacher, Undyne - Knight/cop). While Chara in Undertale is a manifestation of the "RPG mindset", the Chara of Deltarune might be a manifestation of the desire to Screw Destiny and do whatever one pleases, in reaction to Deltarune's lack of meaningful choice and railroading.
  • There's the obvious implication that Chara is Kris, but that makes for an even more insidious conclusion to draw; if Chara escaped the underground, then that means that the canon ending to Undertale has to be a post-Genocide Pacifist run. And if the picture with all the crossed out faces is anything to go off of, that means Chara's only been biding their time before everything goes to hell.
  • In the Golden Ending of Undertale, Flowey asked you to stop playing the game so that everyone could live happily. But if you do choose to continue playing by resetting the game, Flowey asks you to at least wipe everyone's memories so that they don't have to remember what you've taken from them. Sure, maybe you never touched Undertale again, but by choosing to play its successor, Deltarune, you're now dooming everyone to another story of hardship, in the same life or not.
    • Per Word of God, Undertale's ending isn't affected by Deltarune in any capacity — "UNDERTALE's world and ending are the same as however you left them. If everyone was happy in your ending, the people in the UNDERTALE world will still be happy."
  • Do the special flowers in Asgore's home seem familiar to you? They should. Almost all of them have colors identical to the SOULs of the six human children he murdered in the original Undertale. It gets even more unsettling when you realize there's a golden flower among them taking the place of the red SOUL...
  • Also regarding Asgore, in the original game, Toriel left him because she hated that he vowed to kill any human that fell into the Underground, which meant he killed a lot of the children that he rescued. What did Asgore do in this timeline?!
    • Considering this is an Alternate Universe to Undertale where they all live in the normal and mundane town of Hometown, what happened was probably just the standard break-up.
    • Except that Toriel's actual complaint was that Asgore was being wishy-washy — a single SOUL was enough that he could have left the Underground and killed enough humans to let him free the monsters from their prison, but he wasn't willing to commit. Given that this universe's monsters were never imprisoned, and Gerson is dead, it raises questions about that tactic and its possible use...
  • The story seems to be an alternate universe plot where things didn't happen quite as we know it, judging by the various changes and missing character relationships. Then you meet Sans, who has his usual Leaning on the Fourth Wall nature and you have the option to proclaim it's good to see him again. Then he says he's never met Kris before, and his other dialogue choices seem to be looking for ways to entrap the player into saying knowledge the player, not Kris, would know. Even worse, you can ask Undyne about Alphys, and they've never met — something that only someone with pre-existing knowledge of Undertale would assume a connection on, to begin with. What the hell is going on that meta-knowledge from a different storyline has become plot-relevant?
    • It's possible that the SOUL/Player we control is the same one that controls Frisk in Undertale.
  • Several lines imply that the mysterious individual who drove Jevil insane was W.D. Gaster. If Gaster has already made contact with at least one person, then what else has he done in the Kingdom of Darkness that we don't know about? Is he with us... or against us?
    • Gaster's report address a lot of 'darkness' stuff. Furthermore, his life was 'cut short' as he 'fell into his own creation'. He may have ended in Deltarune's dark world. For all we know, he may *be* Jevil.
  • On the subject of Jevil, consider his card motif: he represents the Joker, a card which famously doesn't quite fit with the rest of the deck, not belonging to any particular suit and being stronger than most other cards. This seems to fit quite well with Jevil's insane nature, as well as his incredibly challenging boss fight...except that brings us to the worrying fact that a standard deck of cards has two Jokers. Could there be someone else like him out there in the Dark World?
    • Jevil is paired with Seam, the nihilistic shopkeeper. If anyone is the other Joker, it's him.
      • But Seam can't be the other Joker. The Dark World doesn't exist completely in isolation, it's all paired with real objects from the real world. There's a real deck of cards that Jevil is one of the Jokers from and Seam is...a stuffed animal. So what about the second Joker card?
      • However, Sean as the other Joker fits within traditional Tarot motifs. In the original Tarot deck (before dedicated cards), one Joker was used as "The Fool" (obviously fitting Jevil as the ex-court jester), and the other Joker was used as "The Magician." True enough, Seam originally served as the court magician alongside Jevil.
    • It explains his "I can do anything!" in particular, since in many card games, Jokers are wild (hence why he uses attacks of all four suits).
      • He can use more than just the four suits. Before he attacks, he explains the rules of his game. In other words, he acts like a rules card too.
  • If your party's HP is depleted, you get the usual game over screen, with the mysterious voice commenting that you have met an end. Usually per gaming convention, you are offered the choice to continue or not. Not doing so will give you a message that the world will be plunged in darkness simply because you chose that option. The fridge part comes in when you realize that, either out of curiosity or because you thought it would quit to main menu, you've now created an ending to the story where the party has been Killed Off for Real! The result? The world (and your game) is forever going to be a black void, with nothing but the darkness to see and ambience to hear.
  • When you install the game, the terms and conditions are a simple and brief "YOU ACCEPT EVERYTHING THAT WILL HAPPEN FROM NOW ON.", There is a reason why the game tells you that your choices do not matter; you surrender any control over the outcome of the game as soon as you accept those terms.
  • By throwing away the only SOUL in their body, Kris (or whoever/whatever's possessing them) also threw away their ability to feel love and compassion towards others.
    • This could also have to do with the possible anagram of Kris being risk when rearranged; giving more meaning towards their nature.
  • Susie has very visibly yellow teeth. At first, this just seems like a quirk of her character design. But alongside other subtle hints about her character, including her ragged clothes and excessive fixation on food, may be one of many signs that she's suffering from some serious neglect at home.
    • Supporting this, Susie has an uncharacteristically-serious reaction when Lancer mentions tooth decay.
    • Alternatively, it could be extreme poverty such that her family simply can't afford to care for her properly, whether they want to or not.
    • Her Violence Is the Only Option quotes implies that she actually is abused, though. Just who taught her to think like that?
  • "Your choices don't matter." Seems to be a Take That! towards the player, right? Well, it could also actually be a message to Kris, who, for most part of the game, never got to choose their own actions.

Fridge Logic

See the Headscratchers page.

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