An open-world sandbox survival game set after a devastating alien invasion. Scavenge for resources, craft, build defenses, and harness alien technology to fight back. Play solo or in co-op and reclaim what’s left of the planet.

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 25402292
Update posts
10 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 |
|---|---|---|
| 25402292 | Alien Apocalypse Early Access Update 0.2.2.15 |
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 |
|---|---|
| 23 Sept 2026 | Alien Apocalypse Early Access Update 0.2.2.15 Patch notes |
| 11 Sept 2026 | Alien Apocalypse Early Access Update 0.2.2.11 - Improvements and asjusts. Patch notes |
| 4 Sept 2026 | Alien Apocalypse Early Access Update 0.2.2.9 - Save/Load bug fixed Patch notes |
| 2 Sept 2026 | Performance, combat, and loot improvements. Patch notes |
| 1 Sept 2026 | Polishing and quality of life improvements Patch notes |
| 29 Aug 2026 | Alien Apocalypse Early Access and Demo Updates Update |
| 29 Aug 2026 | Alien Apocalypse Update - Instability issues fixed Patch notes |
| 28 Aug 2026 | Alien Apocalypse Update - Improvements and balancing. Patch notes |
| 27 Aug 2026 | Bug Fixes and Adjusts - Inventory system, parkour and more. Patch notes |
| 26 Aug 2026 | Adjustments and corrections - Alien behavior and more 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