Summary
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
Supporters
Alexcar3000
Angry Dummy
ArbitraryNumbers
Magi RobloxG
DeezNuts1102
Dexteradon12
HomestuckLover1
Johtoboy98
LeonRaidenYun
MarvelFanatic119
MegalovaniaBonetrousle
MegamanTheBlueLolicon
No-Scope-On-Scratch
Oblivion00
PenguinKingpin
Saikou the Lewd King
Salavtore
Squid Peanut
TheGuyWithPOWER
TheLuffyPlayery
Tzula
Undylan
WarriorWare
Wjsgamer
Xantospoc
Yes850
Sans with Shades
Raian230
Opponents
ExerciseDancefloors
HotmanX32
Pocket-Chu
Timefreezer4
Omegagoldfish
Neutral
Anonimo77
CoreOfimBalance(COB)
Elione-chan
Ultima Reality
Juggerton
FateAlbane
Megamangohan
Serpent of the Internet 97
Characters
Humans
Monsters
Others
Tier List
God Tier
Annoying Dog
Asriel Dreemur
Photoshop Flowey
Top Tier
The Player
Frisk (Pacifist)
Chara
Sans (KARMA)
Frisk (Genocide)
Undyne The Undying
Mettaton NEO
High Tier
Flowey (Most likely)
Asgore Dreemur
Toriel
Undyne
Amalgamates
Mettaton
Muffet
Final Froggit
Mid Tiers
Royal Guards
Tsundereplane
Papyrus (Probably High Tier when going all-out, but has never tried to kill anyone)
Mad Dummy
Greater Dog
Dogi
Doggo
Napstablook
Low Tier
Moldsmal
Froggit
Bird That Carries You Over A Disproportionately Small Gap
Temmie
Unknown Tier
W.D Gaster