Halo 3 - Xbox 360
It has a good story, an awesome multiplayer system, and lets you make your own maps.
A truly scary video game with great graphics. Don't play this one in the dark if you are a jumpy person. This game is pretty disturbing, but that's part of the fun.
Think my boyfriend would get a kick out of shooting his co-workers with marshmallows... it's a step up from nerf darts because they're edible and easily replaced!