Perfect Dark Zero does not even come close to the best FPS's, but it has some good characteristics that make it good.
The Bad: Some objectives are made too easy, graphics look like a playstation 2 game at times and the gameplay is more sensitive than a 3rd grade school girl.
It's hard to believe that this game was given a 9.0 from gamespot and then chosen as editor's choice. Almost any XBOX FPS surpasses the gameplay of this game. It's not a bad game by any means. It has an interesting storyline, a wide array of weapons at your disposal, and the graphics are stunning at times. But while playing you will come across unrefined parts of the environment, the AI characters repeat the same thing over and over again and you'll find yourself unable to consistantly aim throughout most of the game. Worth playing, but not worth buying. Save your money and wait until a game comes that is not good, but superb, and trust me, they will be here and will be incredible. (Gears of War, Halo 3, Brother's in Arms)