Terraform a lifeless rock into a lush and habitable world. Build trucks, trains, and sprawling factories on an enormous hexagonal planet. Grow its population to millions. Enjoy a dynamic simulation of atmosphere, temperature, water, and forests.

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 26248975
Update posts
9 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 |
|---|---|---|
| 26248975 | Plan B - v1.1.4 and Demo | |
| 26046642 | Plan B - v1.1.3 |
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 |
|---|---|
| 19 Oct 2026 | Plan B - v1.1.3 Update |
| 2 Oct 2026 | Plan B - v1.1.2 Update |
| 30 Sept 2026 | Plan B - v1.1.1 Update |
| 23 Sept 2026 | DLC & Free Major Update live now! Update |
| 14 Aug 2026 | New DLC + Free Major Update Update |
| 4 Mar 2026 |
| Plan B – v1.0.6: clouds fix Update |
| 22 Dec 2025 | Plan B – v1.0.5: actual production stats, quality of life Update |
| 3 Dec 2025 | Plan B - v1.0.4: Production Screen, Elevation Lines Update |
| 9 Oct 2025 | Plan B - v1.0.3: unity vulnerability fix, multi-selection item/recipe change Patch notes |
| 29 Sept 2025 | Plan B - v1.0.2: selection production stats... Update |
| 15 Sept 2025 | Plan B - v1.0.1 Update |
| 22 Aug 2025 | Plan B - v0.9.6: Sound Design, Localisation! Update |
| 30 Jul 2025 | Plan B - v0.9.5: new Terrain Tool! Update |
| 24 Jun 2025 | Plan B - v0.9.4: grass everywhere, improved transports! Update |
| 6 May 2025 | Plan B - v0.9.3: copy-paste! Update |
| 11 Apr 2025 | Plan B - v0.9.2 Update |
| 21 Mar 2025 | Plan B - v0.9.1 Update |
| 13 Mar 2025 | Plan B - v0.9 major update Update |
| 10 Mar 2025 | v0.9 released in a few days Update |
| 6 Dec 2024 | v0.9 progress Update |
| 24 Sept 2024 | Plan B - v0.8.4 Update |
| 10 Sept 2024 | Plan B - v0.8.3 Update |
| 8 Aug 2024 | Plan B - v0.8.2 Update |
| 5 Jul 2024 | Plan B - v0.8.1 Update |
| 27 Jun 2024 | Plan B - v0.8 major update Update |
| 29 May 2024 | v0.8 progress Update |
| 11 Mar 2024 | Plan B - v0.7.5 Update |
| 24 Jan 2024 | Plan B - v0.7.4 Update |
| 27 Dec 2023 | Plan B - v0.7.3 Update |
| 4 Dec 2023 | Plan B - v0.7.2 Update |
| 10 Nov 2023 | Plan B - v0.7.1 Update |
| 6 Nov 2023 | Plan B - v0.7 major update Update |
| 2 Jun 2023 | Plan B - v0.6.9 build 701 (hotfix : build 702, 703) Update |
| 25 Apr 2023 | Plan B - v0.6.8 build 685 Update |
| 3 Apr 2023 | Plan B - v0.6.7 build 672 Update |
| 7 Mar 2023 | Plan B - v0.6.6 build 655 Update |
| 28 Feb 2023 | Plan B - v0.6.5 build 647 Update |
| 13 Feb 2023 | Plan B - v0.6.4 build 637 Patch notes |
| 8 Feb 2023 | Plan B - v0.6.3 build 635 Update |
| 6 Feb 2023 | Plan B - v0.6.2 build 630 Update |
| 30 Jan 2023 | Plan B - v0.6.1 build 619 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