I run a TwinView, dual monitor system. I like to play games fullscreen on one of the monitors, not spanning both. With
wine, this works by just setting it to desktop mode and setting the resolution to that of one screen. For OpenTTD, I used Compiz's Window Rules plugin.
But I have a few native games that this doesn't work for. Today's experiment involved Prey (Doom 3 engine) but I've had similar issues with other ID engines.
So in short: has anybody found a way of having Prey/OpenAreana/Doom3/etc run in windowed mode but with fullscreen decorations (that is to say, no borders and above the panel)?