A 4-player online co-op survival horror game. Avoid the contaminated rain, gather scrap and get back to the tram. Monsters that copy your friends' voices and behavior, and many other threats, stand in your way. Gear up and stick together to survive.

Public builds
—No reading yet
Counted once we have watched for 90 days (since 21 Oct 2026)
Distinct builds deployed to a game's public (default) Steam branch, as Steam's client network describes them.
Checked within minutes of each Steam change. Observed since 21 Oct 2026.
Source: Steam client network (PICS), App info, public branch. Full methodology
Latest public build
Build 26212298
Update posts
24 postsPosts announcing an update, tagged or not
Posts in a game's official Steam news feed that announce an update: tagged as patch notes by the developer, or plainly about a patch or a released update.
Source: Steam Web API, ISteamNews/GetNewsForApp. Full methodology
Typical gap between builds
38 daysMiddle gap across the last 3 builds we saw
| Build | Went live | Patch notes |
|---|---|---|
| 26212298 | None posted | |
| 26157600 | MIMESIS Update Notice (10/26) | |
| 25381161 | MIMESIS New Mode Update Notice (9/18) |
From Steam’s client network, last checked . Builds before 21 Oct 2026, when we started watching, aren't listed. Patch notes are the developer’s update post from an hour before to a day after the build. Not every build gets one. How we count
| Posted | Update |
|---|---|
| 18 Sept 2026 | MIMESIS New Mode Update Notice (9/18) Update |
| 23 Jul 2026 | MIMESIS Update Notice (7/23) Update |
| 23 Jun 2026 | 6/23 Hotfix Patch notes |
| 18 Jun 2026 | 6/18 Hotfix Patch notes |
| 18 Jun 2026 | Game Crashing After the Update? Read This If You've Used Mods Update |
| App | Players now | Latest build |
|---|---|---|
| MIMESIS Playtest · App 3915130 | No count | 26212458 · |
Separate Steam apps for test, staging and playtest versions of MIMESIS. They have no store page, so they aren’t counted as games or releases. Builds come from Steam’s client network, players from the Steam Web API every few hours. Steam gives no count for an app nobody can launch. How we count
| 17 Jun 2026 |
| 6/17 Hotfix Patch notes |
| 15 Jun 2026 | MIMESIS Update Notice (6/15) Update |
| 26 Mar 2026 | 3/26 Hotfix Notice Patch notes |
| 19 Mar 2026 | 3/19 Hotfix Notice Patch notes |
| 12 Mar 2026 | MIMESIS Update Notice (3/12) Update |
| 13 Feb 2026 | 2/13 Hotfix Notice Patch notes |
| 11 Feb 2026 | MIMESIS Update Notice (2/11) Update |
| 19 Dec 2025 | 12/19 Hotfix Notice Patch notes |
| 18 Dec 2025 | MIMESIS Update Notice (12/18) Update |
| 10 Dec 2025 | 12/10 Hotfix Notice Patch notes |
| 2 Dec 2025 | 12/02 Hotfix Notice Patch notes |
| 1 Dec 2025 | 12/01 Hotfix Notice Patch notes |
| 28 Nov 2025 | 11/28 Hotfix Notice Patch notes |
| 27 Nov 2025 | Nov 27 Update Notice (Public Lobby) Update |
| 13 Nov 2025 | 11/13 Hotfix Patch notes |
| 12 Nov 2025 | 11/12 Update Notes Update |
| 5 Nov 2025 | 11/5 Hotfix Patch notes |
| 1 Nov 2025 | 11/1 Hotfix Patch notes |
| 31 Oct 2025 | 10/31 Hotfix Patch notes |
| 29 Oct 2025 | 10/29 Update Notice Update |
| 28 Oct 2025 | 10/28 HOTFIX Patch notes |
| 11 Jun 2025 | [HOTFIX – June 11th ] Patch notes |
Steam keeps no record of past build numbers, so before 21 Oct 2026 a game’s update history comes from its own Steam news: posts tagged as patch notes, and untagged posts that plainly announce a patch or a released update. Older posts are still being read in, most played games first. How we count