All mods

 80423
4 
FixPluginTypesSerialization
Fixes custom Serializable structs and such stored in mod plugin assemblies not getting deserialized by the native Unity engine code.
Last updated: 6 months ago
 1755
3 
ULTRAV2
yet another harder V2 mod but this time it actually somewhat changes the behavior of V2
Last updated: 6 months ago
 2492
2 
DeathcatcherSchizophrenia
every level arena wave theres an enemy replaced with a deathcatcher
Last updated: 6 months ago
 1290
2 
PocketEnemies
APRIL FOOLS! Tiny enemies have fun nerds.
Last updated: 6 months ago
 388
2 
OilSlideUniversalManipula
Makes Oil Slide Universal consistently
Last updated: 6 months ago
 5945
4 
ThirdPerson
Play ULTRAKILL in Third Person, like actually.
Last updated: 7 months ago
 5095
1 
GiantCoins
have you ever wanted to kill an enemy with a big ass coin?... no just me and my dog? oh well ok still gonna make this mod
Last updated: 7 months ago
 935
3 
No Cheats When Typing
Cheats dont activate when ur typing in unity explorer and other text boxes (i think)
Last updated: 7 months ago
 3640
0 
PortalCatasrophe
Swaps portal exits with other portal exits randomly, good luck beating the game
Last updated: 7 months ago
 1081
1 
ULTRASKID
Redubs many bosses from ULTRAKILL
Last updated: 7 months ago
 8857
3 
DisintegrationDoors
A mod where doors have a 2% chance to lead to 8-3.
Last updated: 7 months ago
 10402
3 
ULTRAPORTAL
A library for easily creating portals in mods.
Last updated: 7 months ago
 1942
2 
V2Overhaul
Makes V2 a significantly harder opponent with aim prediction, auto-dodge, aggressive coins, 4x health, and 10x faster attacks.
Last updated: 7 months ago
 7644
3 
EyeOfProvidence
A mod that changes how you see the world.
Last updated: a month ago
 23041
8 
ULTRASTATS
Stat tracking, stat viewing, performance analysis, and run logging for ULTRAKILL. (UPDATE ID: FEATHER)
Last updated: 5 months ago
 1998
1 
UltraYoshis
Replaces the skulls rocket torch and soap and books with Baby Yoshis
Last updated: 7 months ago
 2498
2 
BloodFueledEnemies
Adds a cheat which when enabled, allows enemies to heal using your blood based on the configuration used.
Last updated: 2 months ago
 8290
2 
FeedbackersForEveryone
Adds a cheat which when enabled, allows enemies to parry you, with configurable logic controlling how good enemies are at parrying you.
Last updated: 2 months ago
 13263
6 
8 3 DISINTEGRATION LOOP Door thing
every time you open a door there's a 1 in 100 CHANCE to load 8-3
Last updated: 7 months ago
 9959
2 
Cyberloop
Adds a cheat that adds various portal layouts to Cybergrind, which get cycled through with each wave.
Last updated: 4 months ago
 29455
2 
NyxLib
General Library for/used by mods made by Nixya/nyxpirientity. Probably not of much interest to you unless you're installing one of those
Last updated: 2 weeks ago
 8062
2 
V1DancesInPortals
v1 if it was based
Last updated: 7 months ago
 5076
3 
GutterNets
Gives the guttertanks fishnets . . .
Last updated: 7 months ago
 10367
1 
BossRush
Rush through (mostly) every boss without dying!
Last updated: 7 months ago