History WebAnimation / UnderfellRynoGG

* AdaptationalVillainy:
** Asgore, who started the "kill or be killed" belief in the first place.
** Sans also definitely counts as he's been said to have harassed the monsters living in Snowdin Town, believes in the "kill or be killed" idea, and is implied to have been corrupting Papyrus into becoming malicious. In heavy contrast to his canon counterpart, who encourages Frisk to try to get through the Underground without killing anyone, this Sans believes that it's foolish for them to believe that they can spare everyone.

** Sure, Sans' attack is now 5, but his attacks are mostly easier to dodge, he doesn't use karma, and he doesn't do damage for every frame, though the invincibility frames are still significantly lower when he attacks, meaning that he can still very quickly kill Frisk if they're not careful.

** Sure, Sans' attack is now 5, but his attacks are mostly easier to dodge, he doesn't use karma, and he doesn't do damage for every frame, though the invincibility frames are still significantly lower when he attacks, meaning that he can still very quickly kill Frisk if they're not careful.

* AdaptationalJerkass: This version of Underfell shows what would basically happen if Sans never made a promise to Toriel. Sans is quick to ambush Frisk and nearly kills them in seconds if it hadn't been for Papyrus, who believes that killing is an "art". Sans doesn't seem very nice to Papyrus either and it's implied that he's psychologically manipulating him into doing what he's doing. Sans will also resume trying to kill Frisk when they've found all the ladder pieces when Papyrus isn't around.

''Underfell'' is [=RynoGG's=] interpretation of the ''Fanfic/{{Underfell}}'' AU. Contrary to appearance, it isn't a GameMod, but rather an animation/machinima.

** Flowey still greets Frisk when they come to the underground, however, it is bit different. Instead of [[BitchInSheepsClothing pretending to be nice and tricking them into running into his bullets]], here, Flowey doesn't even bother fighting them because of his injuries and [[BrutalHonesty bluntly tells them that coming down was a big mistake.]] He still of course brings up his iconic philosophy of KILL or BE KILLED, except he wasn't the one who came up with it.

* AdaptationalJerkass: This version of Underfell shows what would basically happen if Sans never made a promise to Toriel. Sans is quick to ambush Frisk and nearly kills them in seconds if it hadn't been for Papyrus, who believes that killing is an "art." Sans doesn't seem very nice to Papyrus either and it's implied that he's psychologically manipulating him into doing what he's doing. Sans will also resume trying to kill Frisk when they've found all the ladder pieces when Papyrus isn't around.

** Sure, Sans' attack is now 5, but his attacks are mostly easier to dodge, he doesn't use karma, and he doesn't do damage for every frame, though the invincibility frames are still significantly lower when he attacks meaning that he can still very quickly kill Frisk if they're not careful.

* AffablyEvil: Papyrus fits this to a T. Sure, he makes it very clear to Frisk that he ''does'' intend to kill them, but he's relatively polite about it and believes it has to be done fairly and correctly, through traps as opposed to Sans' more direct and ruthless attempts. In fact, he ''apologizes'' to Frisk for Sans being to aggressive.

* AngerBornOfWorry: Flowey is very much frustrated with Frisk constantly sparing the various monsters they come across as he insists that kindness won't be enough to stop them from trying to kill them.

* AxCrazy: Toriel while she was DrivenToMadness, having killed several monsters in the past and at one point, a human, whose remains can be seen in their "bedroom."

* BecauseYouWereNiceToMe: This is the main reason why Frisk can help ease the various residents of the underground. It is also the reason why Flowey is tagging along with them as he was mysteriously wounded with no further explanation.

* ComicallyMissingThePoint: When one of the Drakes says that they wanted to eat the ladder piece, Flowey said they shouldn't especially since it's made of wood. The Drake then realizes that there are trees all around him, so he could eat them instead.

* DeathGlare: Toriel gives one to Flowey when she sees him trying to talk to Frisk

* DrivenToMadness: Many years after Asgore first installed the "kill or be killed" rule, the monsters eventually turned "[[red:Malicious]]." To spare them, Frisk needs to cure them of their "Malicious" status then fulfill any other spare conditions they may require before sparing them.

* {{Foreshadowing}}: When the player opens the game's properties they type in a string of words at the end of the target prompt. What do these words say? "[[AlwaysChaoticEvil evilmode]]".

* OminousVisualGlitch: When the player loads up the exposition cutscene, it briefly glitches, before returning back to normal. This is a subtly hint that the world you are about to enter is ''very'' different. It also happens again when meeting Flowey as his {{Leitmotif}} distorts and the screen briefly flashes white, with the theme now slowed and revealing a now wounded Flowey.

** When Napstablook is ticked off, he can put on his GameFace and go from a white BedsheetGhost to a black one with red highlights. However, he drops the mask once he feels regret for attacking Frisk who was trying to be nice to them.

* ViolationOfCommonSense: The best way to calm down plenty of malicious enemies usually ends up being what appears to be the ''opposite'' of what you normally would want to do. For instance, Loox's becomes sparable if you pick on it (it's glad to see that you aren't afraid of it) and Snowdrake requires you to heckle it once before you can react to its joke like normal. Also, the concept of approaching a malicious enemy with kindness seems rather absurd until you realize that patience is key.

* WhyDontYouJustShootHim: Sans would rather just kill Frisk directly and instantly but Papyrus insists they need to do it the "right" way, through death traps and trickery.

* WouldHurtAChild: As expected, many of the monsters attack Frisk without hesitation. The only difference? They are now doing so with [[red: malcious]] intent.

In March of 2022, [=RynoGG=] announced that this interpretation of Underfell will be included as one of the worlds Kris, Susie, and Noelle travel to in her crossover fangame ''VideoGame/{{Deltatraveler}}''.

** When Napstablook is really ticked off, he can put on his GameFace and go from a white BedsheetGhost to a black one with red highlights. However, he drops the mask once he feels regret for attacking Frisk who was trying to be nice to them.

** Played straight with Napstablook as he was only he attacked Frisk because they [[NotAMorningPerson disturbed his slumber]], and once they start to cheer him up, he stops fighting them and apologizes for attacking them. He also reveals that the reason why he was in Ruins in the first place was to get away from all the rude monsters that were everywhere else, but he is glad to find someone who is genuinely a nice person.
* UncleanlinessIsNextToUngodliness: One of the biggest hints that this Toriel is as civilized as the one we are used to is the fact that her dress is not only dirty but also tattered. It's almost as if had been battle-damaged from several fights...

* DeathGlare: Toriel gives one to Flowey when he sees him trying to talk to Frisk

* DarkerAndEdgier: As per usual for Underfell, the underground of this world is very much dark. However, there are far less warm and dark edges to be seen and are instead replaced with more realistic horrors that are discussed quite frequently. This includes insanity, depression, abuse, and of course, murder.