Rulers of the Red Plane

ConfigFile but it uses Zio, which means it can do steam cloud.

Risk of Options support for Zio Config File

API for making Artifact Codes

API for registering Colors to the game

API for registering console commands

API for adding content to the game

Core R2API module

API for registering damage types

API for adding custom in-game difficulties

API for easily modifiying the Director (RoR2 monster / interactable spawner) behaviour

API for adding custom damage over time effects

API for adding custom elite types

Networking API around the Unity UNet Low Level API (LLAPI)

API for Prefab creation, networking and duplication

API for manipulating Character Stats

A convenient API for adding BepInEx ConfigEntry's to a option menu

An API focused with the intention of working in an editor enviroment using ThunderKit, MSU is a modular API system designed for ease of use and simplicity.