One must own PS3 game????????

There is a Recommendations Sticky in this board.

Anyway, the Game most would say is Metal gear Solid 4. My favourite would be Disgaea 3. Others I really enjoy(ed) are Burnout: Paradise, Eye of Judgment and Dynasty Warriors 6. Later two haven't a big fanbase, while Burnout: Paradise has a relatively big fanbase. Other great Games are Uncharted, Heavenly Sword, Soul Calibur 4 and Valkyria Chronicles (if you enjoy the mix it has).

If you like Action: MGS4

If you like RPG: Valkyria Chronicles

If you like FPS: The Orange Box (way better deal than R2 IMO)

If you like Adventure: Uncharted or Tomb Raider Underworld.

MGS4R7_3