Teksensei Aug 2, 2013 @ 8:00pm
Work around: Game failed to start (error code 53)
Right click on "Quake II" in the Library, choose "Properties" , in the "General tab" click on the button "Set Launch Options...", and enter "+set game xatrix" (without the quotes), then start Quake II. To return to the original Quake II, just remove "+set game xatrix" from "Set Launch Options...".