Darkspace

Your only stat is vision, and there is no goal but to keep going.

Dive into the darkspace, a series of interconnected rooms and corridors with one thing tying them together—they're dark. Your only stat is vision—low vision means you cannot protect yourself, nor attack, nor act quickly or reasonably, nor realize what is around you (be it enemies, resources, etc) and it greatly reduces your sanity. Taking damage reduces not health but vision, but enemies' rules are the same as the player’s (also possessing a vision stat), and so you might just be able to sneak past an enemy with lower vision than you to prevent a conflict altogether. Now if you reach 0 vision, you may not lose immediately, but who knows what horrible monsters could creep up on you when you have no way of stopping them.

The game is designed for two people, one player and one storyteller, but it can be adapted for more than one player.