Splinter cell: Chaos Theory for the PS2 is completely underrated and is one of the best games for the PS2 even if the XBOX graphics are better. This is the third installment of Tom Clancy's Splinter cell series. This game has brilliant graphics for a PS2 title and controls perfectly. The best part I liked about this game was its co-op mode. It was hours of fun and was extremely challenging. If one of the players gets killed, the other can heal him back within a time limit. I have beat the game twice, and being a stealth game fan, this is and will be one of my favorite games of all time. The only downside is the ending to the last level but it doesn't really affect my overall score. This is a perfect game and a must buy.