Subsurface Circular

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When the truth is buried, go underground. Step into this new take on text-based adventure from the award-winning team behind Thomas Was Alone and Volume. A short story that hands you the fate of the world above, as a detective looking for answers on the Subsurface Circular.

Developer: Bithell Games
Released: 17 Aug 2017
Price: Paid
Platforms
Steam Deck: Playable
Languages: English
Metacritic: 83

Patch announcements

0 posts

Posts the developer tagged as patch notes

Last 90 days · as of 23 Oct, 17:04 UTC

How this is measured

Posts in a game's Steam news feed that Steam tags as patch notes.

News checked every 30 days. Observed since 23 Oct 2026.

An announcement is not a build. Developers can ship updates without a post, or post about several updates at once.
Each check keeps the 10 most recent posts. Quiet games are checked as rarely as monthly, so a very busy feed can have gaps, and posts from before our first check may be missing.

Source: Steam Web API, ISteamNews/GetNewsForApp. Full methodology

Announcements

New Game Announcement - Vampirium: 1997
8 Jul 2026 · Community Announcements
New Bundle and Creator Keys - Bithell Games' Legacy Celebration
17 Nov 2025 · Community Announcements
We made another narrative short called Quarantine Circular!
22 May 2018 · Community Announcements
Subsurface Circular, nearly one month later
14 Sept 2017 · Community Announcements
Subsurface Circular, nearly one month later
14 Sept 2017 · Community Announcements
Update 2 - Secondary station bug fixes
19 Aug 2017 · Community Announcements
Update 2 - Secondary station bug fixes Patch notes
19 Aug 2017 · Community Announcements
Update 1 - Resolutions and missed train stops
18 Aug 2017 · Community Announcements
Update 1 - Resolutions and missed train stops Patch notes
18 Aug 2017 · Community Announcements

From the game’s Steam news feed, last checked 23 Oct, 17:04 UTC. An announcement is not a build: games can update without posting. Every public build we saw is on the Builds tab.