To install, you typically extract the contents to a folder and run the Risk of Rain 2.exe file. If you plan to mod this version, you will need to install BepInEx and place plugins in the /Risk of Rain 2/BepInEx/plugins/ directory. Modding - Risk of Rain 2 Wiki
This version was a minor update focused on bug fixes and stability improvements following the major expansion. Notable aspects of this specific build include: File: Risk.of.Rain.2.v1.2.4.1.Incl.ALL.DLC.zip ...
Always scan .zip files from unofficial sources with updated antivirus software. To install, you typically extract the contents to