Nuclear Reactor Simulator: Take Control. Prevent Disaster. Power the World.

Public builds
—No reading yet
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 24681356
Update posts
14 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 |
|---|---|---|
| 24681356 | 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 |
|---|---|
| 22 Jul 2026 | Patch notes: V 2.2.25.219 Patch notes |
| 12 Jul 2026 | Patch notes: V 2.2.25.218 Patch notes |
| 7 Jun 2026 | Patch notes: V 2.2.25.217 Patch notes |
| 13 May 2026 | Patch notes: V 2.2.25.216 Patch notes |
| 12 Apr 2026 | Patch notes: V 2.2.25.215 Patch notes |
| 2 Apr 2026 |
| Patch notes: V 2.2.25.214 Patch notes |
| 13 Feb 2026 | Patch notes: V 2.2.25.213 Patch notes |
| 10 Feb 2026 | Patch notes: V 2.2.25.211 Patch notes |
| 13 Jan 2026 | Patch notes: V 2.2.25.209 Patch notes |
| 9 Jan 2026 | Patch notes: V 2.2.25.208 Patch notes |
| 7 Jan 2026 | Patch notes: V 2.2.25.207 Patch notes |
| 4 Jan 2026 | Patch notes: V 2.2.25.206 Patch notes |
| 3 Jan 2026 | Patch notes: V 2.2.25.205 Patch notes |
| 2 Jan 2026 | NEW UPDATE AVAILABLE Update |
| 18 Aug 2025 | Patch notes: V 2.2.25.203 Patch notes |
| 17 Aug 2025 | Patch notes: V 2.2.25.202 Patch notes |
| 16 Aug 2025 | Patch notes: V 2.2.25.201 Patch notes |
| 12 Aug 2025 | Patch notes: V 2.2.25.200 Patch notes |
| 10 Aug 2025 | Patch notes: V 2.2.25.199 Patch notes |
| 9 Aug 2025 | Nucleares v2.2.25.198 - Time Freeze & Volumetric Lighting Update Update |
| 11 Jul 2025 | Patch notes: V 2.2.25.195 Patch notes |
| 26 Jun 2025 | Patch notes: V 2.2.25.194 Patch notes |
| 22 Jun 2025 | Patch notes: V 2.2.25.193 Patch notes |
| 24 May 2025 | Patch notes: V 2.2.23.190 Patch notes |
| 14 May 2025 | Patch notes: V 2.2.23.189 Patch notes |
| 13 May 2025 | Patch notes: V 2.2.23.188 Patch notes |
| 4 May 2025 | Patch notes: V 2.2.23.187 Patch notes |
| 29 Apr 2025 | Patch notes: V 2.2.23.185 Patch notes |
| 27 Apr 2025 | Patch notes: V 2.2.23.184 Patch notes |
| 26 Apr 2025 | 📢 🏢 New Update – The Diesel Generators Have Their Own Building! Update |
| 14 Apr 2025 | Patch notes: V 2.2.23.182 Patch notes |
| 13 Apr 2025 | Patch notes: V 2.2.23.181 Patch notes |
| 13 Apr 2025 | Patch notes: V 2.2.22.180 Patch notes |
| 11 Apr 2025 | 📢 🚨 New Update Available – The Crane is Back and Better Than Ever! Update |
| 4 Mar 2025 | Patch notes: V 2.2.22.178 Patch notes |
| 22 Feb 2025 | Patch notes: V 2.2.21.177 Patch notes |
| 20 Feb 2025 | Patch notes: V 2.2.21.176 Patch notes |
| 9 Feb 2025 | Patch notes: V 2.2.20.174 Patch notes |
| 9 Feb 2025 | Patch notes: V 2.2.20.173 Patch notes |
| 8 Feb 2025 | The game has been updated to version 2.0! Update |
| 19 Aug 2024 | Patch notes: V 1.2.20.167 Patch notes |
| 18 Aug 2024 | Patch notes: V 1.2.20.166 Patch notes |
| 16 Aug 2024 | Patch notes: V 1.2.20.165 Patch notes |
| 2 Aug 2024 | Patch notes: V 1.2.20.163 Patch notes |
| 20 Jul 2024 | Patch notes: V 1.2.20.162 Patch notes |
| 10 Jul 2024 | Patch notes: V 1.2.20.160 Patch notes |
| 7 Jul 2024 | Patch notes: V 1.2.19.159 Patch notes |
| 4 Jul 2024 | Patch notes: V 1.2.19.158 Patch notes |
| 3 Jul 2024 | Patch notes: V 1.2.19.157 Patch notes |
| 25 Jun 2024 | Patch notes: V 1.2.19.156 Patch notes |
Showing the latest 50 of 170. Show all
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