Metal Gear Solid 4: Guns of the Patriots
One of the few best games so far in 2008, along with GTA 4 and Super Smash Bros. Brawl.
Of all the Metal Gear games, MGS 4 is perhaps more action-packed, along with some emotional moments in the game. In some ways, it also wrapped up some loose ends that began with Metal Gear Solid.
In another way, it's somewhat a bittersweet ending, as MGS 4 marks the final appearance for Solid Snake, nor will Hideo be involved in the series anymore.
Regardless, however, this is the best game out there for the Playstation 3.