Undertale (also stylized as UnderTale or UNDERTALE) is a role-playing game developed and published by indie developer Toby Fox.
In Undertale, players control a human child who has climbed Mt. Ebott and fallen into the Underground: a large, secluded region underneath the surface of the Earth separated by a magic barrier. The inhabitants of the Underground are the monsters, a diverse group of non-humans who were banished there after a great war with the humans. A notable feature of the game is the degree to which your actions affect the world around you; practically all possible choices have an effect.
Power of this Verse
Undertale is a deceptively powerful verse, being far stronger than one would expect at first glance. This is due in part to many powerful abilities, such as Determination (which quite literally makes a more determined soul more powerful), time manipulation, soul manipulation, and more. Its God Tiers even reach into multiversal levels of power, capable of creating, resetting, and completely erasing countless timelines, at will. The mid to high tiers sit firmly within Tier 7, with exceptional speed and unique hax allowing many of them to take on characters they normally shouldn't be able to.
Note: For an in-depth explanation regarding the placement of the verse's highest tiers, see here.
Supporters and Opponents
Saikou the Lewd King
Sans with Shades
Serpent of the Internet 97
CharactersHumans Monsters Others
Undyne The Undying
Flowey (Most likely)
Papyrus (Probably High Tier when going all-out, but has never tried to kill anyone)
Bird That Carries You Over A Disproportionately Small Gap