Quick answer

The latest IRON NEST builds at the time of checking were Build 1577 (August 9–10, 2026), preceded by Build 1558 (August 8) and the day-one Build 1547 (August 7). The game updates fast — three builds shipped in its first four days. Patch records below are sourced from SteamDB; the developer's news feed is the final authority. Verified August 12, 2026.

Patch history

| Build | Date | What it changed (reported) | | --- | --- | --- | | Build 1577 | Aug 9–10, 2026 | RAM/VRAM optimization | | Build 1558 | Aug 8, 2026 | Critical save-corruption fix | | Build 1547 | Aug 7, 2026 | Day-one patch: localization and bug fixes |

Patch contents are summarized from SteamDB records, which track build numbers and the developer's brief notes. The developer posts short summaries; some context in this tracker (like which fixes matter for progression) comes from player reports and is labelled accordingly.

How to check your own version

Your build number is shown in the Steam client after an update completes. There is no in-game version menu confirmed — the Steam library entry and update log are the reliable places. If your Steam client shows a build newer than 1577, the game has patched since this page was checked; the patch tracker will be updated on the next verification pass.

Why version tracking matters in this game

  • Save corruption: Build 1558 fixed a critical save-corruption bug. If you are on 1547, update before continuing a campaign — players reported corrupted saves on the launch build.
  • Performance: Build 1577 targeted RAM/VRAM usage, which matters on lower-end machines.
  • Behavior changes: controls, timings, and menu behavior can shift between builds. Guides on this site carry check dates; the patch tracker is the map for what changed when.

When was this last checked?

August 12, 2026. The game's first week shipped three builds, so expect this page to change frequently. Bookmark the official Steam news feed for the authoritative announcement channel.

Sources and update note

Patch contents are SteamDB-sourced and summarized; the developer is the final authority. Last checked August 12, 2026.