Is your controller not working with Warhammer 40K Space Marine 2? It is a known issue that the developers have addressed on their website and they have provided a possible workaround until the developers release a permanent fix. If that doesn’t work, the community also has some recommendations, so keep scrolling to find out what steps you need to follow.
Warhammer 40,000 Space Marine 2: Fix Controller/Gamepad Not Working on PC
If you are using a wireless controller, please note that Steam does not always support them. Therefore, connect the controller via USB and disable Steam Input to avoid conflicts with controllers.
Now, for some players, the controller still doesn't work in Warhammer 40K Space Marine 2, despite having Steam Input disabled. In such a scenario, u/mmiginator on Reddit recommends starting the game with Steam Input disabled, and once you're in the game, opening the Steam overlay. You can do this by pressing Shift + Tab, as standard.
Next, in your controller settings, enable Steam Input while in the game menu. This should get the controller working, and you'll have to disable and enable it in-game every time you want to play.