Gamelore

I have a pile of PS4 games the size of a walk-in closet, yet I've only played about 20 of them. I want to start and beat on the most challenging level, a random (hopefully good), beatable, co-op game with 1-3 others who have never played. I'll honestly be happy with 1 other who has never played it. It's important to me that that it be novel to both of us, and that you're committed to beating it regardless of the time or difficulty. Name the co-op game you haven't started playing yet, yet want to, and let's get this started.