https://bugs.winehq.org/show_bug.cgi?id=37937
--- Comment #7 from Stefan Dösinger stefan@codeweavers.com --- I think running the game in a virtual desktop will give you back the original behavior. At least it works for me on KDE, tested with World in Conflict. You'll have to set the game to your desktop's resolution to make the virtual desktop borders go away. The resolution of the virtual desktop doesn't matter.