Be immersed into Purgatory Island of undead and dying. Solve mysteries to escape while trying to survive. The undead are rising, zombie skags are swarming the land, and your end is fast approaching! Arm yourself, uncover what you need to survive, and escape the inescapable.

Public builds
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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 3654351
Update posts
0 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
Not enough builds yet| Build | Went live | Patch notes |
|---|---|---|
| 3654351 | None posted |
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 |
|---|---|
| 17 Mar 2019 | Update 4.6.0 Update |
| 18 Nov 2018 | Update 4.5.3 - bHaptics and eSports ! Update |
| 18 Aug 2018 | Update 4.0.0 - HardlightVR and more Update |
| 25 Jul 2018 | Update 3.9.2 Update |
| 3 Jul 2018 | Update 3.9.0 Update |
| 22 May 2018 |
| Update 3.8.5 Update |
| 17 Apr 2018 | Update 3.8.1 (3-5x less loading time!) Update |
| 4 Mar 2018 | Update 3.8.0 Update |
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