I just got the coolest game last night: Lego Star Wars*. Sure, it's a kid's game, but the pod race took me longer than I care to admit. It really is fun to see the Star Wars universe constructed out of Legos. Plus it came with a free ticket for Episode III.
Bascially, you play through Episodes I - III, though I've heard that you can unlock Episode IV: A New Hope - or as I grew up calling it, Star Wars.
*Another Star Wars-related gift from my mother.