Hi, I got the mid 2014 RMBP 15" 2.8Ghz i7 with 750M. When i play some games via Steam like Killing Floor or Max Payne 3, and lets say i'm tweakin some settings at graphics, the game freezes and i cannot close the game, but all the other apps works just fine. Like i was having a conference with my friends while playing and the game freezes but still could communicate with my friends. But i dunno how i can close the app without shutting down my laptop. I tried CMD+TAB, CMD+Q, pretty much all the buttons, finger swipes, nothing works when the game freezes. Any help pretty please?