There is an official website that just went up about a brand name of energy drink called OverCharged. Seeing as this is the first real info we have about the game, I'm going to go ahead and guess that the ingredients used in the drink were what led to people becoming mutated in the game.
If you're eagerly waiting for any news about this game like me, it's really nice to finally get something. Although I do expect it to be delayed until 2015.
It's actually kind of a neat site. And it gives us intros to who will obviously be characters in the game.