Feral games buggy!

I have this and TombRaider...they were working just fine, played them with a Logitech F310 over Christmas break and when I came back after putting my mid-2012 MBP 15" Retina to sleep...they refused to open! I restarted, deleted & re-downloaded the game, threw away the preference file, restarted again...nothing. Batman gets stuck at the splash screen and TombRaider doesnt even make it to the title screen, it just hangs. Save your money!!

Update 12/29/15: ok so all is well again. Apparently its GameCenter thats the problem. What works for me is to launch GameCenter first, but dont sign in. Then run the game. It should then switch back to a dialog screen asking you to sign-in into GameCenter; choose cancel, and the game should start up fine. Thank you Feral for your support.

JPharmD about Batman: Arkham City GOTY