Steam Next FestOctober 19 to 26

Billionth Soul

Everyone is counting on you. Literally.

A real time roguelite deckbuilder. Draft cards, build humanity's last colony, and keep life support from running out.

Play free demo on Steam Wishlist on Steam

Full game coming November 2026

Free demo for Windows, macOS, and Linux

Billionth Soul full game: 61,358,000 souls on a busy colony grid, twelve seconds of life support remaining, and unlocked Vent and Scrub controls showing the cost of each exchange. — Full game screenshot. Twelve seconds of life support. Vent for souls, or Scrub to buy time. Select the screenshot to view it full size.

Your first 100,000 souls.

Start with one thawed sleeper aboard a failing generation ship. Draft and place Habitat, System, and Program cards on the colony grid. Grow the population before life support runs out.

The free demo takes you through the first three population targets to Township, with early Research Lab tiers included. The full game takes the colony to one billion souls.

Played a run? Share feedback on Steam.

October 17, 2026

Billionth Soul joins Steam Next Fest

Play the free demo now, ahead of Steam Next Fest on October 19 to 26. The full game releases in November 2026.

All news

The studio

One gnome. One billion souls.

Gnomesoft is a one-person indie studio making roguelites with deep runs and rising numbers.

We ship small, strange, replayable games. No publisher, no roadmap slides, one very determined gnome.