Documents\Klei\OxygenNotIncluded\mods\Steam\NameOfMod\NameOfMod\mod_info.yaml (Nested folders often happen if you extract a folder inside a folder).

When you download a mod from a site like or the Klei Forums , it will usually come compressed in a .zip or .rar archive.

: Ensure your files aren't buried. If your path looks like .../local/ModName/ModName/mod.yaml , the game cannot read it. Move the internal files up one directory layer.

Notes:

To manually install mods for (ONI), you must place the mod files into a specific "local" folder within your game data directory . This process is the same whether you use the Steam or Epic Games Store version of the game. 1. Locate the Manual Mod Folder

C:\Users\[YourUsername]\Documents\Klei\OxygenNotIncluded\mods

Look for your manually installed mod in the list. It will display a local folder icon next to it instead of a Steam icon.

Which do you play the game on (Steam, Epic Games, or GOG)?

Documents\Klei\OxygenNotIncluded\mods\local\ModName\mod_info.yaml If you see Documents\Klei\OxygenNotIncluded\mods\local\ModName\ModName\mod_info.yaml , it is nested too deeply and won't work. 3. Move the Mod Folder

: Verify your folder structure. The path must be ...\mods\local\[ModName]\mod.dll . If your files are buried inside nested folders (like ...\local\[ModName]\[ModName]\mod.dll ), the game will not detect them.

%LocalAppData% typically expands to C:\Users\<YourUsername>\AppData\Local . The LocalLow directory is inside AppData .

(You may need to reveal the Library folder via Finder → Go → Go to Folder)