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Underfell is a popular Undertale AU where all of the monster's personality are modified to be more hostile or edgy. Although the monsters have a hostile personality, Flowey, in this AU actually has a SOUL of his own and guides the protagonist, aka Frisk and helps them on their journey. The common color motif is Red and Yellow and is worn by all of the Monsters, except for Flowey and Glad Dummy.

Sans Edit

Sans is a grumpy, angry, hot-headed monster instead of the fun, relaxed guy we all know and love. In Underfell, Sans sticks to the motto, "It's kill or be killed." He looks the same but he has sharp teeth with one golden tooth, red sneakers, and a black jacket. Not to mention he has red pupils instead of white. He will try and get Frisk to attack him and other monsters because Frisk is supposedly sparing every monster they meet. It ticks him off, and he will do everything he can to try and change Frisk to be evil like them.

Papyrus Edit

Instead of the loud, happy, energetic skeleton we know from Undertale, we get a loud, terrifying, uncontrollable rude, and selfish Papyrus in Underfell. His costume consists of the two colors red and black, and he has a few scars on his face near his sockets. Papyrus is very controlling of his brother, and if Sans even shows a little resistance, Papyrus will beat him or torture him to do his bidding. When he encounters Frisk, he keeps them "prisoner", when really he actually doesn't have the guts to kill them himself.

Toriel Edit

In Underfell, Toriel is completely different. She has yellow eyes with red pupils, she has clawed hands/paws, and she wears a black dress. Yes, she will act like the motherly goat mom in Undertale, but when Frisk tries to escape, she will end them like Asgore did with the other children. She wishes to give them, "A Painless End." As she would call it.

Routes Edit

Neutral Route Edit

This route, also known as a "Pacifist" or simply a "Normal Ending" is one of the three main routes. It is when either you kill some monsters or spare them. The boss in this route is Alpha Flowey.

True Pacifist Route Edit

This route is also known as the "bad ending". It is when you do a specific number of things in order to unlock it, and when you don't kill any monsters in the process. It plays like the Genocide Route in the end, with Sans being the Final Boss.

Genocide Route Edit

This route is when you kill all the monsters and is considered to be the "good ending". It plays sort of like the Pacifist Route in the end, with either Asriel being the Final Boss (if Flowey is spared), or Sans being the final boss (If Flowey is killed).

Game Edit

The game has not been created as of yet. Dates for the game is unknown.

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