You know when a game is marketed as something that challenges some sort of alleged conspiratorial industry mandate to be "polite, colorful, politically correct and trying to be some kind of higher art" that it's probably offensive just because that gets attention, and not actually because it's making a profound statement about a prevailing moral police state.
Whatever the motivations of Polish developer Destructive Creations, though, their debut title Hatred has definitely generated plenty of attention, so achievement unlocked there.
The game is a mass-murder simulator, and not in a hyperbolic, Fox News Special Edition-class mass-murder simulator kind of way. It really is what it says on the box. As the otherwise unnamed "Antagonist", your mission is simply to kill everybody indiscriminately, just because.