Razeak on 12 May 2014
It's a close one between Contra with my brother on NES or Super Mario 3-D World with my wife and kids on WiiU. I give Contra only the slightest edge. The first Halo was really great for a FPS co-op experience when it first released. To my surprise, for all of it's bugs and odd choices, post patched Aliens: Colonial Marines was pretty fun with my 6 year old son(though it pales in comparison to the ones above).
