Controller is not detected

1. Right-click on Warhammer 40,000: Space Marine 2 under LIBRARY > Properties.
2. Click on Controller.
3. Select Disable Steam Input from Override for Warhammer 40,000: Space Marine 2.
4. Close CONTROLLER window.

Disable Steam overlay

• Go to Steam > View > Settings > In-Game > uncheck "Enable the Steam overlay while in-game"
• Press OK

Clear Download Cache on Steam

Clearing your download cache can solve problems with games that won't download or start.

Here is a guide on Clear Download Cache

DLC is not shown in game

1. Right-click on Warhammer 40,000: Space Marine 2 under LIBRARY > Properties > DLC.
2. Tick the box under INSTALL and close the DLC window.

3. Click Steam (upper left) > Settings > Downloads.
4. Click on the Clear Cache button from Clean Download Cache and click Confirm.
5. Steam will restart automatically.

NOTE: This process will not affect your currently installed games, but you will need to log into Steam afterward.

Verify Integrity of Game Files

1. Right click on Warhammer 40,000: Space Marine 2 under LIBRARY > Properties.
2. Click on Installed Files > Verify integrity of game files.

Full guide on STEAM: Verify Integrity of Game Files