Killzoned on 16 February 2010
Depend what type of gamer you are
If your into RPG'S and JRPG then i would recommend Lost Oddsey, Mass Effect 1 + 2 (One of the best RPG This Generation!)
Honestly Mass Effect 2 is a must get even if you haven't played ME1
Look out for Alan wake, That game looks promising, Amazing Visuals and gameplay
Left 4 Dead 2 - A really fun game especially when you are playing online with someone random or a friend
Essay Pro