Well, I should have worded that better, shouldn't have been so dismissive. By 'serious' I meant 'resource intensive'. I don't know all of those games, bit the games I do know are definitely not very taxing on a GPU (aside from Skyrim, but what settings are yo uplaying it at? Does that seem worth it for the price tag?)

I don't think you'd argue that a mac is a good gaming rig from a performance / $ perspective (or any other perspective really).