Hello @mtdeguzis, we're using one issue report per unofficially supported game title, so I've gone ahead and transferred this issue report to https://github.com/ValveSoftware/Proton/issues/79#issuecomment-419674039.
Ok, i'll remember this for the future, hopefully things can get a bit more organized if that's the case or we should be titling the issues with a generic "GAME - APPID - Support issues" Or, create a milestone for each game to track multi-issues.
proton 3.7x1 2018-09PROTON_LOG=1x1 2018-09PROTON_USE_WINE3D11=1x1 2018-09
Compatibility Report
System Information
I confirm:
Proton log: https://gist.github.com/mtdeguzis/539d0ab9ebb89b13f144febc0d8ef43f
Symptoms
No mouse lock, left/right mouse button actions cause sporadic movement
Reproduction
When the game starts, you can only get mouse control by clicking left/right mouse first. Things work well enough, but when you start the game, you cannot look around until you pause the menu first. After this, using left/right mouse cause sporadic movement instead of the expected action.
Game was started with: