This usually means the mod is outdated or missing a dependency (like PLib). Check the mod's documentation to see if it requires a specific "library" mod to function.
Note: If the mods or local folders do not exist inside your Klei directory, simply right-click, create a new folder, and name them exactly as shown above (case-sensitive). Step 2: Download the Mod Files
To install the mod properly, the game requires a specific folder hierarchy. oxygen not included how to install mods manually
Before diving into the "how," it is important to understand the "why."
How to Install Oxygen Not Included Mods Manually Whether you’re playing on a DRM-free version from GOG, Epic Games Store, or simply want to bypass the Steam Workshop for better version control, knowing how to install mods manually for Oxygen Not Included (ONI) is a vital skill. This usually means the mod is outdated or
: The game will prompt you to restart to build the new mod cache and apply the changes. Click restart. Troubleshooting Common Manual Mod Issues
(if mod is a packed .zip from Workshop)
The folder structure depends on your OS and store:
Important: If you use ONI‑Modloader, do NOT also use the Steam builtin local mods folder for the same mod (conflicts possible). If ONI detects an external modloader it may bypass Steam Workshop; remove ModLoader.dll to use the Steam builtin loader. Step 2: Download the Mod Files To install
How to Manually Install Mods for Oxygen Not Included While the Steam Workshop is the easiest way to manage your colony's upgrades, players using the Epic Games Store
If you want to create your own mod, refer to Klei’s official modding guide in the game files under OxygenNotIncluded/modding/ .