History VideoGame / TSUnderswap

** The Game Over screen is a homage to [[VideoGame/{{Earthbound}}]], with the protagonist lying in a beam of light and the game calling their death "a bad dream".

** Team Switched borrows the name Mettacrit for Mettaton's name as a ghost monster from ''Webcomic/{{Storyshift}}''. Since Voltrathelively gets credited for it in the demo's credits and even listed as a playtester for the demo (as Voltra), it would seem they had the creator's blessing.

* AmbiguouslyEvil: Downplayed with [[spoiler:Flowey]] in the demo because his motives in the game have yet to be revealed. It's made pretty clear he's [[spoiler:still not a sweet and innocent flower even in this world, between him hinting that Chara will need to kill to survive, Temmie thinking he's put Chara up to their actions in Genocide and admitting to envying him as a rival in that ending, and in Neutral him not perturbed in the slightest if Chara betrayal-kills Asgore, still saying that Chara is like him and admitting to being no better than the Temmies sometimes. Still, he chases the Temmies off before they can gang up on Chara when he didn't need to, makes no move to attack them and take their SOUL himself afterward, and instead is set up as an ally to Chara and an enemy to the Temmies for the full game. Since his ultimate goals are unknown, it's not clear if Flowey is biding his time playing a longer con on Chara than his Undertale counterpart pulled on Frisk, or if he will be a sort of [[AntiHero morally lax ally]] leaving the active villainy up to the Temmies.]]

* AmbiguouslyEvil: [[spoiler:Flowey. He seems to be on Chara's side, protecting them from the Temmies, talking up how he and Chara are alike as kind-hearted people in Pacifist, and seeming as cheerfully foreboding as Sans in Genocide, but he doesn't seem outright against your actions in Genocide either, where Temmie thinks he's put them up to it and admits to envying him as a rival.]]

** Likely Gaster, who will be swapped with Riverperson and probably avoid his counterpart's fate of being scattered across time and space.

** A new gameplay feature is to slow down Chara's soul by holding X, making particularly dense bullet patterns easier to dodge. The fight with the Ruined Knights is meant to teach you this if you don't know it already.

* BigDamnHeroes: Asgore saves you from Temmie when they try and kill you, and [[spoiler:when seven of them try to gang up on you, ''Flowey'' pops up to defuse the tension by threatening to call Asgore on them.]]

* AdaptationNameChange: In the Demo, Mettaton is changed to Metacrit, while Burgepants is changed to Burgepant.

** The Greasers, but specifically Aaxel, who goes out of his way to make Burgerpant's life hell for no reason other than believing that he's trying to make moves on Flara.

* WhamLine: Done after reaching the end of City of Old, where you encounter Temmie again;

* JerkAss: The Mad Dummy. They attack Chara no matter what they do during the tutorial, and even cause trouble for other monsters offscreen.

* CloudCuckooLander: Possibly Chara. They can do some pretty odd [=ACTs=] with monsters like Frisk, stack a glass of water and minimart items on top of their head instead of carrying them in their hands, and the Mad Dummy hears them mumbling their check of them if you choose to Check the Mad Dummy instead of saying goodbye in the tutorial, which could mean Chara is saying all their narration out loud under their breath.

* AdaptationExpansion: The Ruins has more areas to explore, including new puzzles and an entire new city. You can talk to way more monsters in the Ruins overworld, there as more minibosses for the area, and new features (like the journal you can keep notes about monsters in, and sidequests to earn extra gold) to dig into.

* AmbiguousSituation: Whether it is [[spoiler:the player or Frisk compelling Chara to leave the Ruins]] in Pacifist. Since Chara and Frisk are swapped, it would make sense for Frisk [[spoiler:to have more of a presence in Pacifist like how Chara has more of a presence in Genocide]], but statements from Team Switched indicates the [[spoiler:player may be an InUniverse force and since '''we''' want to progress the game by leaving the Ruins...]]

** In Pacifist, [[spoiler:Chara's dialogue options shows they want to stay with Asgore and are confused and scared when the dialogue keeps changing to them pressing him on how to leave the Ruins, with them trying to plead for help by the end. Regardless of whatever [[AmbiguousSituation the possessing entity's]] intentions are, it's clear that Chara is frightened all the same]].

** Team Switched borrows the name Mettacrit for Mettaton's name as a ghost monster from ''Webcomic/{{Storyshift}}''. Since Voltrathelively is credited as a playtester (as Voltra) in the demo's credits, it would seem they had the creator's blessing.

* StupidityIsTheOnlyOption: In the room where you fight the Ruined Knights, there is a bridge with a sign that refers to it as the "human capture bridge", and each end of it has deactivated spikes. It's obvious that as soon as you step onto the bridge, the spikes are going to activate and trap you, but there is no other way to proceeed.
* TotemPoleTrench: One of the Greasers, Norman, is quite obviously this. Specifically, he's a Froggit, a Whimsun, and a Loox, as foreshadowed by his attacks in battle. You can spare him by revealing this, making him run away, and his components can be found at Grillby's after.

** A new gameplay feature is to slow down Chara's soul by holding X, making particularly dense bullet patterns easier to dodge.

* BewareTheNiceOnes: Asgore will not hesitate to kill you on a genocide run, and if you spare him and then try to enter his house, he'll angrily yell at you to GetOut.

* FunetikAksent: As shown by one of the naming EasterEggs below, Alphys seems to have a French or German accent that she didn't have in ''Undertale''.

** [[spoiler: Asgore makes this face during his final attack on a genocide run, as a reference to one of Toby Fox's original concepts]].

* TotemPoleTrench: One of the Greasers, Norman, is quite obviously this. Specifically, he's a Froggit, a Whimsun, and a Loox, as foreshadowed by his attacks in battle. You can spare him by revealing this, making him run away.
* VideoGameCaringPotential: While exploring the City of Old, there are various sidequests you can do for a small reward, such as watering a plant and helping to clean up a messy office.

''TS!Underswap'', or ''Team Switched!Underswap'', is a fangame of ''VideoGame/{{Undertale}}'' that is currently under development by Team Switched. It's based on their own version of the extremely popular RoleSwapAU known as Underswap. One major difference from vanilla Underswap is that ''TS!Underswap'' aims to swap the characters but '''not''' their personalities, along the same lines as fellow ''Undertale'' role swap fan projects ''Webcomic/{{Storyshift}}'' and ''Webcomic/InvertedFate''. ''TS!Underswap'' also introduces other original concepts to make the game more unique, like "swapping" the areas in ''Undertale'' and introducing new monsters and original plot elements.

* UnexpectedCharacter: [[spoiler:Flowey popping up at the end of the demo to try to defuse the situation with you and the Temmies, with the implication he's going to be as important in the full game as he was in ''Undertale''.]]
* VideoGameCaringPotential: While exploring the City of Old, there are various sidequests you can do for a small reward, such as watering a plant and helping to clean up a messy office.

* RecurringBoss: Downplayed with the Mad Dummy. We haven't actually fought them yet (unless you count the tutorial), but they reappear to chase Chara through the Ruins and will likely show up for another fight in the full game since they haven't settled the score by the time Chara leaves the Ruins.

* FakingTheDead: You can "kill" Mettacrit in the demo, but it's blatantly obvious from what we know from the original game and what a show Mettacrit puts on as he does it that it's just an act. In a neutral run, he'll even tell you that ghosts are immune to your attacks, but in a genocide run, the journal will list him as dead even though he faded away rather than dusted, and you didn't gain any EXP from it, implying that Chara believes they really killed him.

* JerkAss: The Mad Dummy. They attack Chara no matter what they do and even cause trouble for other monsters offscreen.

** When you reach the end of the puzzle gauntlet, there will be a door that takes you back to the beginning of the ruins. Reaching the City of Old will make another door available as well. These seerve as a way to visit earlier areas without having to backtrack all the way through the ruins (especially since the bridge to the city gets broken once you reach it).

* BreakingTheFourthWall: Papyrus and Sans at the end of the post-credits sequence, where Papyrus lampshades that people would've expected [[spoiler:to encounter him instead of Sans]] (referencing how vanilla Underswap has Papyrus [[spoiler:replace Sans in meeting the human first]]) and assuring fans that waiting for the full game to come out will be worth it.

* FakingTheDead: You can "kill" Mettacrit in the demo, but it's blatantly obvious from what we know from the original game and what a show Mettacrit puts on as he does it that it's just an act. In a neutral run, he'll even tell you that ghosts are immune to your attacks, but in a genocide run, your journal will list him as dead even though he faded away rather than dusted, and you didn't gain any EXP from it.

** [[spoiler: Asgore makes this face during his final attack on a genocide run, as a reference to one of Tobby Fox's original concepts]].

* FakingTheDead: You can "kill" Mettacrit in the demo, but it's blatantly obvious from what we know from the original game and what a show Mettacrit puts on as he does it that it's just an act.

** Mettacrit's [[https://tsunderswapofficial.fandom.com/wiki/Mettacrit design]] shares certain similarities with the ''Franchise/{{Pokemon}}'' [[https://bulbapedia.bulbagarden.net/wiki/Misdreavus_(Pokémon) Misdreavus]].