1. Killzone 2
Great game, one of my favorite FPS's ever and favorite PS3 title so far.
2. The Elder Scrolls IV: Oblivion
(GOTY Edition) Loved this one, one of my favorite rpg's.
3. Resistance 2
An average FPS, nothing really special, it wasn't a bad game though.
Very unique platformer with a ton of creation tools, the sequel could be revolutionary.
5. Ratchet & Clank Future: Tools of Destruction