The Mortuus Demo is free on Steam for Windows, macOS and Linux, released October 14, 2026, and includes online co-op. Official Runs cap at round 25 (or the first boss). Press Press It stays up until about 1–2 weeks before the January 11, 2027 launch. Dev
What’s in the demo
| Feature | Demo | Source |
|---|---|---|
| Solo play | Yes | Official |
| Online co-op (1–4) | Yes — “DEMO CONTAINS MULTIPLAYER CO-OP” | Official |
| Map editor & Workshop | Yes | Official |
| Round limit | 25, then a vote for one more round | Press Players |
| Easter egg / first boss | Yes; reaching it ends the demo run | Press Press |
| Second map | Full game only | Press |
| Most unlocks | Locked to full game | Players |
| Progress carry-over | No | Official |
| Storage | 1 GB | Official |
Languages
The demo has full audio in English, French, German, Spanish (Spain and Latin America), Portuguese (Brazil), Russian and Simplified Chinese. Japanese is listed without full audio in the demo; the full game lists full Japanese audio. Official Official
Reception
On 2026-10-29, Steam showed 93% positive of 833 user reviews for the demo. Official The developer called the demo’s performance “AMAZING” and said it has been consistently on the charts. Dev
About the round-25 cap
Finishing wave 25 brings up a team vote for “JUST ONE MORE ROUND.” Players Players have asked to lift the cap now that launch is in January; there has been no change announced. Coverage says the full game has no round limit. Press
FAQ
Is the Mortuus demo free?
Yes. Mortuus Demo is a free download on Steam (app 5363350) for Windows, macOS and Linux.
Does the Mortuus demo have a round limit?
Yes. A run ends at round 25 — the team can vote “JUST ONE MORE ROUND” for a final wave — or when you reach the Easter egg / first boss.
When will the Mortuus demo be removed?
About 1–2 weeks before the January 11, 2027 launch, according to the developer.
How big is the Mortuus demo?
Steam lists 1 GB of storage for the demo (2 GB for the full game).
Sources
Labels: Official store page or pinned post · Dev developer statement · Players community report, not confirmed by the developer · Press coverage.
- Official Mortuus Demo — Steam store page (app 5363350) — 2026-10-29
- Official Mortuus — Steam store page (app 3680170) — 2026-10-29
- Dev Steam announcement: "Mortuus Release Date Revealed!!" — 2026-10-26
- Official Pinned "Mortuus | Frequently Asked Questions" — Steam discussions — 2026-10-27
- Players Community thread: "Can everyone vote to continue after wave 25?" — 2026-10-28
- Press MeinMMO — Steam Next Fest October 2026 top 10 (German) — 2026-10
- Press gaming-st.com — Mortuus demo guide: Japanese, co-op, PC specs (Japanese) — 2026-10
- Official Pinned "Workshop Maps | Share Your Creations" — Steam discussions — 2026-10-21
- Players Community thread: "progress" — 2026-10
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