Teksensei Aug 2, 2013 @ 8:01pm
Work around: 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 rogue" (without the quotes), then start Quake II. To return to the original Quake II, just remove "+set game rogue" from "Set Launch Options...".