The Corpse Below

Descend into a cave deeper than any man was ever meant to go. You are a Miner Knight, a miserable soul sent on a one way down quest into the absolute darkness to reach The Dreamer, the corpse of an ancient and forgotten god, laying at the very bottom of these caves.
Explore four increasingly hostile layers, manage your health, sanity, hunger and thirst. Scavenge for food, navigate treacherous caves, and survive unnatural creatures. Survive horrid states such as poison, curse, breathless, melting, insane, etc.

Before your descent, choose a forbidden god to worship. Each offers unique blessings, passives, and commandments that will shape how you survive. Don't you dare break their rules. The deeper you delve, the more twisted the caves become.
Pray your god is still listening.