Batman Arkham City

Source: http://www.gamesonsmash.com/wp-content/uploads/2010/12/Batman-Arkham_City_Batman-Harley.jpg

I don't play video games often, but Batman: Arkham Asylum was absolutely amazing.  The sequel Batman: Arkham City is slated to come out this October, and it looks equally as good.  Here's a trailer for the game, where you can apparently play as Catowman, rather than just Batman.