It's not just necessarily the blood and gore that caused the controversy, but a lot of it has to do with the innocent people. Like, the trailer shows a woman pleading with him, before he plants the gun in her mouth and pulls the trigger. It's some pretty brutal stuff.
That being said, I wanted to get the game just outta spite, but it seems like a decent twin-stick shooter, too. Unfortunately, my computer sucks so I can't run the game.
Also, the game got some pretty bad reviews.
P.S.: Not's voice sounds kinda forced. Kinda wish they got a voice more like Steve Blum's (not particularly the actor, but the sound of the voice would have been perfect).
get it, i called him Not, because his name is Not Important *ba-dum-dish*