10. Aliens: Colonial Marines

Left 4 Dead looked like a great game, but with a short length of play, I could tell it was not enough for a full priced game, especially after the Orangebox was a far better deal.  Aliens: Colonial Marines aims to bring back that hectic coop game play that may fill 2009’s void, once the new smell wears off Left 4 Dead.  Not much is known about this game at this point other than it involves Marines, Aliens ready to pounce on you from every angle, and its coop.  But what more is there to know?