Grand Theft Auto V is a dark game. Dealing with not only the criminal misbehavior of the past titles but of broken friendships, dead friends and life slipping away. No one understands this better than the character Trevor. He's a guy who truly lives in the moment. Whether it's selling hitchhikers to cults, punching strippers a stealing other people's wives he holds nothing back.
Check out this Trevor-centric cut-scene edit from YouTube user KetothoPL edited in the style of a horror film. It's easy to see how GTA V could easily become a survival horror game. A get away from Trevor DLC would be pretty damn scary.