LOSE YOUR MIND. EAT YOUR CREW. DIE. Take the helm of your steamship and set sail for the unknown! Sunless Sea is a game of discovery, loneliness and frequent death, set in the award-winning Victorian Gothic universe of Fallen London.

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 24946998
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 |
|---|---|---|
| 24946998 | Bug Fixing Patch v3.0.0.31 |
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 |
|---|---|
| 27 Aug 2026 | Bug Fixing Patch v3.0.0.31 Patch notes |
| 29 Jul 2026 | Maintenance update Patch notes |
| 26 Jan 2023 | Bug Fixing Patch v2.2.11.3212 Patch notes |
| 9 Apr 2020 | Sunless Sea: Zubmariner Edition and Sunless Skies: Sovereign Edition release update Update |
| 6 Jun 2018 | Sunless Sea Update V2.2.4.3141: The Blemmigan Gallivanter Update |
| 3 Nov 2016 |
| Zubmariner Achievements and November Update! Patch notes |
| 21 Jul 2016 | Sunless Sea update for July Update |
| 26 Feb 2016 | Zubmariner Update: The Zee-Floor Update |
| 16 Nov 2015 | Zubmariner update: Unknown Depths Update |
| 3 Sept 2015 | The Rise of Pigmote Patch notes |
| 10 Nov 2014 | The waters of Adam's Way are perilous... Update |
| 21 Oct 2014 | Story update: 21st October Update |
| 9 Oct 2014 | STEEL update is live! Update |
| 30 Sept 2014 | STEEL is here! Update |
| 26 Sept 2014 | Content updates... and STEEL nearly here Update |
| 30 Jul 2014 | Emerald Update is live! Update |
| 9 Jul 2014 | Patch V0.5.1.1383 now live Update |
| 8 Jul 2014 | The Patch Bell tolls 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