Some mods target the Mono version of the game, which is available by opting into the Steam beta branch "alternate"

S1API Forked
S1API is an open source collaboration project to help standardize Schedule One modding processes.The goal is to provide a standard place for common functionalities so you can focus on making content versus reverse engineering the game.
Last updated | a day ago |
Total downloads | 79 |
Total rating | 1 |
Categories | Libraries Mono IL2CPP |
Dependency string | ifBars-S1API_Forked-1.7.9 |
Dependants | 0 other packages depend on this package |
This mod requires the following mods to function

LavaGang-MelonLoader
The World's First Universal Mod Loader for Unity Games compatible with both Il2Cpp and Mono
Preferred version: 0.7.0README
A Schedule One Mono / Il2Cpp Cross Compatibility Layer
S1API is an open source collaboration project to help standardize Schedule One modding processes. The goal is to provide a standard place for common functionalities so you can focus on making content versus reverse engineering the game.
S1API was originally created by KaBooMa as an open source collaboration project to help standardize Schedule One modding processes. This fork (GitHub: ifBars/S1API) continues development with updates, fixes, and improvements while keeping the same spirit and goals.
Do I need this?
If you're using or plan to use any mods that depend on S1API, then yes.
How do I manually install this mod?
Installation is pretty straight-forward.
- Download the ZIP file from Nexus Mods or Thunderstore.
- Extract all files locally so you have them in a folder.
- Copy the
Plugins/
andMods/
folder into yourSchedule I
folder.- This is typically found under
C:\Program Files (x86)\Steam\steamapps\common\Schedule I\
- This is typically found under
To uninstall, remove the associated plugins and mods files from the respective directories.
How do I use this to make mods?
Go check out the extremely helpful resources on our GitHub.
I'm getting errors from S1API, what do I do?
Please head over to the GitHub page and create a new issue for us. This helps us keep track of what problems people are experiencing!
Drop us an endorsement ❤️
It's not easy being an API. Content is always king, not the backend glue! Endorsements are free and really helps drive our motivation for this project.