what is the one kick-ass, action-oriented video game I should own? Here are the criteria: A) It must be available for Xbox 360, B) it must kick-ass* and C) hopefully, hopefully is an open world type dealio (C is negotiable, so don't think it is absolutely necessary).

*By kick-ass I mean it must be all about shooting shit and blowing stuff up (hacking things up with swords would be OK too) and great graphics and just all the nasty business a conservative politician would tell you is responsible for heinous violence among the youths. It would be an absolute bonus if any of this took place in post-apocalyptic settings, but this is not necessary.

I'm not looking for something like Skyrim here although I know it is beautiful and incredibly immersive and all that amazing crap. I don't care at all if it has a good story or not. I want something that plugs into the primal beast that hungers for blood, sex, and a high body count.