Kenryoku_Maxis on 27 April 2011
In terms of a new IP, Assassins Creed was my favorite. But the Batman: Arkham series might eclipse that once Arkham City comes out. We'll just have to see.
I'm a sucker for free roaming/Metrovania type games. And those two series hit the nail on the head. I'd even venture to say they did 'Metroid' style progression and exploration better than Prime and Other M.
Six upcoming games you should look into:
