Halo 3 - Xbox 360
It has a good story, an awesome multiplayer system, and lets you make your own maps.
Love this! I gave this to a friend for Christmas and he loved it as well. I think it's a genius idea and even if you don't drink alcohol, it's still perfect to use to cool down your favorite beverage!
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!