Portal 2

Kent and I just finished playing Portal 2's co-op game last night. (We saved science!)
There are only a handful of xbox games I genuinely enjoy playing (Lego-anything for example), but this game is one of my favorites. It's multi-player so you are working together to solve puzzles so there's a lot less hate going around, which keeps the evenings fun*.
The game is smart, the dialogue is sarcastic humor at its best, and it's science I can get behind, with plenty of speed, momentum, flinging, springing, and of course...portals.
And contrary to what I used to think, not just for boys. Why should they have all the fun?

*I'm dirt mean if I get into a competitive game...of just about any sort.