Mad World is a fast, kick-ass third person game where the player goes around rippping people apart. This game wasn't given an M-rating for the hell of it folks!
The game is divided into surtain levels, and the player progresses through these levels by beating (and slicing) people up throughout the each level. It's the good ol' fashioned 'take no survivors' type game! The character is a muscular, chainsaw-welding freak who enters the town destroying large gangs of villans.
As I said, THIS GAME IS NOT FOR CHILDREN! Even though it takes on a cartoonish-comic book setting, the violence and matyr in Mad World can be pretty gruesome. You carry a chain-saw and dice people limb from limb. If this isn't your kind of theme, then by all means stay away!
I don't want to spoil the plot for anyone, so please do yourself a favor and pick up Mad World for the Nintendo Wii if you like blood battles and stuff.