tristanmcpherson-R2API icon


A modding API for Risk of Rain 2

Last updated a month ago
Total downloads 355484
Total rating 111 
Dependency string tristanmcpherson-R2API-2.4.21
Dependants 281 other mods depend on this mod

This mod requires the following mods to function

bbepis-BepInExPack-3.0.0 icon

Unified BepInEx all-in-one modding pack - plugin framework, detour library

Preferred version: 3.0.0

R2API – a modding API for Risk of Rain 2

Build Status


R2API is a modding framework for other mods to work in, providing centralized and simplified APIs for Risk of Rain 2. This helps keeping mods compatible with each other.

At it's core, R2API should not change how the game behaves without any other mod installed. The only change is to keep mods out of quickplay and prismatic trials by request of the Hopoo Games team.


The contents of R2API should be extracted into the BepInEx folder, such that the files inside the monomod folder in the zip sit in the monomod folder in BepInEx and the files and folder in plugins in the archive is inside your plugins folder.

A succesful installation should look like this:
(click to enlarge)


A lot of documentation is in the included xmldocs, and further information may be on the dedicated R2API wiki. Do not hestiate to ask in the modding discord too!

Bleeding Edge

Unless you are a mod developer, you won't need this.

Want to get the latest versions of R2API? The latest bleeding edge builds of master are hosted on Azure, and may be downloaded using the Artifacts drop down menu.

Note that such builds may be unstable.


The most recent changelog can always be found on the Github. In this readme, only the most recent minor version will have a changelog.








2.3.7 * Fix issue with Twisted Scavengers loot



Available versions

Please note that the install buttons only work if you have compatible client software installed. Otherwise use the zip download links instead.

Upload date Version number Downloads Download link  
2020-4-23 2.4.21 33522 Install
2020-4-3 2.4.10 47212 Install
2020-3-16 2.4.2 22761 Install
2020-3-16 2.4.1 414 Install
2020-1-26 2.3.22 41978 Install
2020-1-11 2.3.20 17640 Install
2020-1-9 2.3.17 2444 Install
2020-1-26 2.3.14 92 Install
2019-12-21 2.3.7 35478 Install
2019-12-19 2.3.5 9365 Install
2019-11-14 2.3.0 13450 Install
2019-11-14 2.2.54 280 Install
2019-10-15 2.2.32 15222 Install
2019-9-19 2.1.16 32937 Install
2019-8-12 2.1.15 19328 Install
2019-7-7 2.1.0 22906 Install
2019-5-29 2.0.10 30423 Install
2019-5-24 2.0.8 4074 Install
2019-5-22 2.0.6 2372 Install
2019-5-22 2.0.5 1525 Install