WINEDLLOVERRIDES="dinput8=n,b" %command%
Downloaded the following dinput8dll https://gamemodding.com/en/gta-san-andreas/others/81709-mouse-fix-dinput8dll.html
Placed in the games DIR: ~/steamapps/common/Pound of Ground/
I used ProtonTricks to inject the dll into the library but also tested and works using the launch option: WINEDLLOVERRIDES="dinput8=n,b" %command%
Mouse doesn't work out of the box, please use the fix i've supplied.
Mouse look in-game not working under Proton
Mouse in menu's works fine but in-game mouse look is broken.
protontricks 33980 wmp11
mouse look not working, and left-right mouse buttons reversed
The reversed left- and right mouse buttons in the menus are a nuisance. But without mouse-look the game is playable only in principle.
I also tried with protontricks 33980 dinput8, but with no noticeable changes.
Game won't launch, get an error message: CPAL3D - Error: "Cannot initialize windows media video playback. Please, reinstall the game."