Perfect Dark Zero. Is it worth your money? Yes and no.
The graphics are nice. Very anime inspired and glossy. The sound isn't too shabby either. Also, the controls are very customizible, tight, and responsive.
All of this sounds good so far, but the problem is this isn't the game to make anyone buy an Xbox 360. Was it supposed to be? Everyone agreed it should have been.
Basically, it boils down to a few things:
If you liked the classic N64 shooters get the game.
If you like FPS games, get it.
If you like pure action games, get it.
So why should you care? Well, it's a good game.
At $60 it's a 8.3. Once the game retails for $20-$30 it's a 8.7.
Bottom line: Good single player, full featured multiplayer that may not produce much new but is still done very well, and it's PDZ.