You start out as a man who's brain has been ruined by a lab experiment. You developed schizophrenia while being tested on. A huge storm knocks out the power in the massive testing facility, and you have the chance to get out, but you have to kill for it. And you aren't the only one. TONS and tons of other poor mentally ill people are tortured and kept in 8 foot by 8 foot cells and escape and fight the guards with blood and weapons to the death. I've only played 10 minutes, but what I saw I regretted seeing.
Please, if you love your children, don't let them even see IMAGES of this game.
This game is NOT a matter of being mature when you play it, it's just a gruesome, disturbing, sickening game.