MadWorld isn't a bloodbath, its a blood ocean.
The visuals are unique, in the way that they consist of only three colors: black, white, and red (red being the blood of your victims). The black and white setting often makes the blood of your enemies stand out; complementing the gory, violent ways you terminate your opponents. And boy, are there a lot of ways to do that. You can kill them by throwing them into spikes, crushing them with a giant "Death Press"; the list goes on and on.
One of the most interesting things about MadWorld is it's commentators, whom I can't remember their names. But their names really don't matter, what they say matters, and what they say contains multiple vulgar terms that would offend anyone. Most of the time, they talk about their experiences with the Death Watch contestants. Oh yeah, they also shoot each other. Not much else is interesting about MadWorld's soundtrack. Just rap music and people screaming for their moms.
MadWorld has "finishing moves", in which the player must move the Wii Remote in a certain direction to complete the eradication of their enemy in a brutal way. Crushing their skulls, snapping their necks, even ripping out their hearts (no typo there, folks). Oh, did I mention Jack has a chainsaw? Yeah, you can see the potential for gore.
If you're looking for some quick bloody fun, then MadWorld is the game for you. It is a bit childish, but its still fun to play. You should learn a lesson from playing MadWorld. What is that lesson, you say? Chainsaws decrease world populations more than hunger, disease, and guns combined.