Xenonauts is a strategy game in which you control a multi-national military organisation defending a Cold War-era Earth from alien invasion, using small squads of persistent soldiers to eliminate the extraterrestrials and recover their technology in turn-based ground combat.

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 12760814
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 |
|---|---|---|
| 12760814 | 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 Apr 2023 | Launcher Update Patch notes |
| 8 Aug 2016 | Xenonauts V1.65 Stable Released! Patch notes |
| 19 Jan 2016 | Xenonauts V1.65 Experimental Released! Patch notes |
| 10 Jan 2016 | Further fixes to Mac / Linux builds! Patch notes |
| 6 Oct 2015 | Mac / Linux Builds Updated Patch notes |
| 29 Sept 2015 |
| Native Mac / Linux Builds! Patch notes |
| 13 Apr 2015 | Xenonauts V1.59 Released! Update |
| 29 Mar 2015 | V1.58 Rolled Back to V1.56 Update |
| 23 Mar 2015 | Xenonauts V1.58 Released! Update |
| 27 Feb 2015 | Xenonauts V1.56 / V1.57 Stable Released! Update |
| 23 Feb 2015 | Xenonauts V1.55 Stable Released! Update |
| 13 Feb 2015 | Xenonauts V1.54 Stable Released! Update |
| 5 Feb 2015 | V1.53 Hotfix Released! Update |
| 31 Jan 2015 | Xenonauts V1.51 Released! Update |
| 26 Jan 2015 | Xenonauts V1.5 / Steam Workshop Released! Update |
| 12 Dec 2014 | Xenonauts V1.5 Available for Testing! Update |
| 23 Oct 2014 | Xenonauts V1.09 Fix & V1.5 / Steam Workshop Testing Update |
| 31 Jul 2014 | "Extras" Update! Update |
| 23 Jul 2014 | Xenonauts V1.09 Released! Update |
| 18 Jul 2014 | V1.08 HF Reverted! Update |
| 30 Jun 2014 | Xenonauts V1.07 Released! Update |
| 19 Jun 2014 | Xenonauts V1.06 Released! Update |
| 16 Jun 2014 | V1.05 HF Released! Update |
| 14 Jun 2014 | Xenonauts V1.05 Released! Update |
| 11 Jun 2014 | Xenonauts V1.04 Released (Stability & Small Difficulty Update) Update |
| 7 Jun 2014 | Xenonauts V1.03 Released! (Stability Update) Update |
| 4 Jun 2014 | Xenonauts V1.01 Released! (Small Stability Update) Update |
| 31 May 2014 | Xenonauts V1.0 Released! Update |
| 9 Jan 2014 | V20 Stable Hotfix Released! 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