Advent Rising (Xbox)
New 3rd person shooter that looks really fun. Humans are the legendary ancient race this time around. Aliens are out to obliterate them because they are destined to unify the galaxy (which I thought was pretty interesting, because humans are usually boring in other games). Yet a 2nd race of aliens follows the teachings of the humans, and warns the surviving ones of the Seekers (the ones who wish to wipe out humans).
I think it looks very promising. Check out the trailer 😉
http://www.gametrailers.com/gt_vault/t_adventrising_e3_2k4_2.html