Copy the folder manually. Unlike many games that bury mods in AppData , ONI has a dedicated, easy-to-find folder. Default Paths by Operating System: Windows:
When in doubt, use the Steam Workshop for ease. But for those times you need a specific, outdated, or custom mod – manual installation is your lifeline. oxygen not included how to install mods manually
Now go forth and optimize those duplicants – modded to perfection. Have a mod that still won’t install? Visit the official Klei forums or the ONI Modding Discord, providing your game log file from Documents/Klei/OxygenNotIncluded/logs/ . Copy the folder manually