I am thinking of running it like a D&D game where I will control all the NPC's and monsters as well as set the scenery for combat but not worry about dice rolls and such, I am also with-holding some information about the specifics of being Hellshocked, it is important that what the red eyes truly means is revealed later on.

Also this will be a mature RP because it will get very gory due to the nature of the story.