MadWorld

[Alpha Six]

It looks fun, but I can't see how the game is going to change much as you progress.
Looks like something fun to play in short burst.

The DeathWatch Challenges are what keep most levels varying throughout the game, that and the amount of interactive environments is crazy, and there's a handful of weapons that you can get just by ripping it from the ground. Hundreds of different kill methods.
Not to mention that it's also multiplayer. I think 2-player splitscreen, but I think there might also be online elements. I don't remember exactly.