About This Demo

When fate deals you a bad hand, you must play it right.

You wake in a cell deep beneath the world, with no memory of who you are or why you were thrown away. This demo covers your first descent — roughly 30 to 60 minutes, from the cell to the fight that closes the first depths.

YOUR DECK IS YOUR LIFE
Every wound you take, every meal you skip, every hour without rest enters your deck as a card. Survival damage doesn't just hurt — it clogs your hands, dilutes your strategy, and slows you down. Eat, drink, rest, or be buried by it.

YOUR DECK IS YOUR CLOCK
Time passes in deck cycles. A lean deck moves fast; a bloated one drags. Hunger, thirst and fatigue accumulate as time flows — every card you add is a choice about how fast you live. Even light runs on it: your torch burns down in cycles, and the dark below is not kind.

EVERYTHING IS A CARD
Weapons grant cards. Spells inject cards. Enemy poison and disease infest your deck as cards.

NO TWO DESCENTS ARE THE SAME
Every run carves a new underground. Rooms, encounters and fortunes are procedurally generated, then persist for the length of your run. Backtrack, map the depths, and choose your route through a world that remembers your passage, even if no one remembers you.

THE DEEP HAS ITS OWN WARS
Three peoples share these caves and none of them are friends. Step into their conflicts or walk past them — they will remember, and what they do about it is yours to find out.

FOUR WAYS TO SURVIVE
Begin as a Brute, a Contrabandist, an Elven Apprentice or a Dwarf Acolyte. Starting points, not cages.

The full game continues deeper, toward the surface and the reason you were left down here.

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

Submundus is made by one person. Generative AI is used in asset production: 3D models are generated from concept art, then rigged, animated and corrected by hand; music and sound effects are generated, then edited and mixed; key art is generated, then composed manually. Game design, systems, writing and balancing are authored by the developer.

Mature Content Description

The developers describe the content like this:

Submundus contains stylized fantasy violence involving humanlike characters and creatures. Combat may include depictions of injury, blood, disease, starvation and death as part of its dark fantasy and survival themes. The game does not contain sexual content, sexual violence, BDSM, drug or alcohol abuse, or self-harm.