Take Smash TV, add zombies, add next gen graphics and you pretty much get the idea
If you love simple old skool arcade games, this definitely worth checking this out. On the flip side if you are after a complicated story, cut scenes and non repetitive gaming then this isnt for you.
This is just fun simple shooter, killing wave after wave of zombies using the same run and gun style and controlling of Smash TV. Also watch for some cool environmental deaths if you shoot the zombies near certain parts of the screen. The Multiplayer and single player mode are both immense fun and is graphically very polished. Definitely worth 800 MS points.