A first-person exploration sim with unrestricted freedom of choice. Envelope is all about gathering supplies, completing quests for strange characters, and preparing yourself for the Final Mission.

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 21007280
Update posts
2 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 |
|---|---|---|
| 21007280 | Patch 4.2335.0 - Performance fixes |
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 |
|---|---|
| 1 Dec 2025 | Patch 4.2335.0 - Performance fixes Patch notes |
| 12 Nov 2025 | Patch 4.2316.0 Patch notes |
| 11 Oct 2025 | Patch 4.2283.1 Update |
| 28 Mar 2025 | Patch 3.2087.1 (Added Russian) Patch notes |
| 10 Oct 2024 | Steam achievements, Chinese translation, more atmostphere! Patch notes |
| 30 Sept 2024 |
| Patch 3.1274.0 Patch notes |
| 28 Sept 2024 | Patch 3.1272.0 Patch notes |
| 21 Sept 2024 | Patch 3.1265.1 Patch notes |
| 19 Sept 2024 | Patch 3.1263.0 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