Shroom and Gloom Demo — Steam vs Prototype vs Early Access

The short answer

A free Steam Demo is currently listed on the main store page. Team Lazerbeam also hosts an older Prototype on itch.io. Neither should be treated as the same build as the paid Steam Early Access release.

Demo, Prototype, and Early Access compared.

Version line	Verified identifier	How to treat it
Steam Demo	App 3602770 Build `23718635`	A separate free Steam app. Its public branch was built June 13 and updated June 14, 2026, according to SteamDB.
itch.io Prototype	Version `0.4.77.1`	An official older prototype for Windows and macOS. Use it to explore the project's roots, not to verify current Early Access cards or progression.
Steam Early Access	App 3271280 Build `25221077`	The current paid development release. Its public branch was built and updated September 10, 2026, according to SteamDB.

Build IDs are version markers, not feature lists. SteamDB confirms which public branch build was visible at the time of checking; it does not prove which cards, characters, quests, or save rules are inside a build.

Which version should you play?

Try before buying

Use the Steam Demo shown on the official store page. It is the clearest current free entry point, though its content may trail Early Access.

See the early concept

Use the official itch.io Prototype if you specifically want development history. Do not follow its card or progression details as current advice.

Play the live release

Use the Steam Early Access app for the current paid game and ongoing updates.

Prices vary by region and over time, so this guide does not quote a fixed purchase price.

Do demo or prototype saves carry over?

We have not found an official carry-over promise. Because the Steam Demo is a separate app and the itch.io release is explicitly labeled Prototype, do not assume that saves, quests, unlocks, decks, or character progress transfer into Early Access.

If preserving progress matters, check the latest Steam announcement or discussion before starting a long run. This page will only mark transfer as supported after an official statement or repeatable current-version test.

Official links and build notes.

Get the current demo: official Steam store page.

Older official release: Team Lazerbeam's itch.io Prototype 0.4.77.1.

Third-party build metadata: Steam Demo public branch and Early Access public branch.

Verification date: September 13, 2026. Build IDs can change after an update.