Make sure you read all that. Co-op, turn-based, RPG, for the PC. I'm just curious. I've tried one game that's pretty much all that (can't remember what it was called, but it was pretty close to the word nostalgia), but my friends didn't stick with it.
I too am looking for a co-op turnbased rpg pc exclusive gaming experience, but with a blind protagonist and features only non humanoid races based in a futuristic post apocalyptic setting with vehicular combat and no guns or magic, oh and zombies.