A tool to ease creating and loading of custom content in ULTRAKILL.

Last updated a day ago
Total downloads 2714
Total rating 5 
Categories Tools Libraries
Dependency string ULTRAKIT-ULTRAKIT_Reloaded-2.2.1
Dependants 3 other mods depend on this mod



A library for BepInEx to add custom content to ULTRAKILL, such as weapons and cheats.

Requires UKT-UMM-Patch compatibility patch if UMM is installed.

Making a mod using ULTRAKIT

  1. Download ULTRAKIT .dlls from https://github.com/PetersonE1/UltrakitReloaded/
  2. Reference ULTRAKIT .dlls within your project to make use of any extensions and functions available.
  3. Register any new cheats on scene load.
  4. Register any new buffs and/or the asset bundle containing new weapons or hats on mod load.

Further instructions and API are available in the wiki



Loader: Dazegambler

Content Injection: Heckteck

Misc. m1ksu

Original Testing: Cecelune


Rewrite and Additional Testing: PetersonE1

If you have any questions, feel free to DM Agent of Nyarlathotep#7519 on Discord, or join the ULTRAKIT Reloaded Discord server at https://discord.gg/gW7MAZRm7z

For a reference, a basic mod, asset bundle, and unity asset folder are available at https://github.com/PetersonE1/UltrakitTestMod



Leviathan teaser in 5-3 and 5-4 are no longer hot pink.

Available versions

Please note that the install buttons only work if you have compatible client software installed, such as the Thunderstore Mod Manager. Otherwise use the zip download links instead.

Upload date Version number Downloads Download link  
2023-3-21 2.2.1 270 Version 2.2.1 Install
2023-3-19 2.2.0 460 Version 2.2.0 Install
2023-3-16 2.1.1 315 Version 2.1.1 Install
2023-3-16 2.1.0 12 Version 2.1.0 Install
2023-3-2 2.0.1 471 Version 2.0.1 Install
2023-2-25 2.0.0 233 Version 2.0.0 Install
2023-1-31 1.5.3 770 Version 1.5.3 Install
2023-1-30 1.5.2 69 Version 1.5.2 Install
2023-1-24 1.5.1 93 Version 1.5.1 Install
2023-1-24 1.5.0 21 Version 1.5.0 Install