Just buy the PC version (many say better than the 360 version anyway) of Mass Effect. It's $20 at most, and you can spend a good 45 hours on each playthru. To recap that even in a 3 hour movie would be difficult, nevermind the medium they chose. Plus, ME1 is in my opinion, the best story for any video game ever. It's truely epic.
BOOM! FACE KICK!