Katamari Damaci

Sara got me a playstation2 for Christmas (you rock baby!), and one of the games I got was Katamari Damaci. I haven't really had a current game console for years now, so I guess I'm just catching up. So far out of all of the games we've played this one is the undeniable winner.
The basic concept: The king of the cosmos got drunk and destroyed all of the stars while partying too hard. The prince (you) help re-create the cosmos by collecting stuff from earth using you're Katamari, a ball that can pick up anything about the current size of your ball. You can start out by grabbing dice while grabbing buildings by the end of some levels. The king takes the stuff you collected, and if there's enough he makes a new star or constellation.
Couple this fun game play with a really catchy Japanese sound track with songs I guarantee you'll be humming later, (take a listen here), and some good old Japanese visuals that make you think you're on illegal drugs (just watch the opening alone) and you've got a great game. I suddenly feel like I'm writing an ad. Try it today!