A melee-only PvPvE extraction game set deep underground. Raid solo or in a squad of up to four, against other players and the Bunker Authority's own recovery crews. Loot, craft and upgrade, but everything you carry is lost if you do not make it out. Free to play.

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 26384802
Update posts
4 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 |
|---|---|---|
| 26384802 | Update 0.2.0 - Industrial Works & NPC Enemies | |
| 25262916 | Update 0.1.3 - Bug fixes |
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 |
|---|---|
| 11 Sept 2026 | Update 0.1.3 - Bug fixes Patch notes |
| 11 Sept 2026 | Update 0.1.2 - Performance improvements Patch notes |
| 8 Sept 2026 | Update 0.1.1 - First fixes and improvements 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
| App | Players now | Latest build |
|---|---|---|
| Bunker Rats Playtest · App 4431650 | Not yet | 24937027 · |
Separate Steam apps for test, staging and playtest versions of Bunker Rats. 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