For Repentance and the newer Repentance+ update, the file structure has changed. Locate the Mods Folder Standard Repentance
The game looks for mods in a specific directory located in your computer's "Documents" folder, not the installation directory where the game's .exe file is located.
This feature bridges the gap between the isolated No-Steam game files and the public Steam Workshop database, allowing for one-click installation and safe updating without needing the Steam client.
Since you aren't using Steam Workshop, you’ll need to download mod files directly from community-hosted sites. Nexus Mods : A primary hub for manual downloads.
Place the unzipped mod folder there (not a .zip file).
Check for a folder named mods inside the main game directory. If it doesn't exist, . Download and Extract : Download the mod as a ZIP file.