Theseus Protocol is a deck building roguelike where rebirth offers strategic opportunity. Utilize a powerful suite of cards and weaponry to uncover the cruel truth behind the dystopian sci-fi world of Mark City.

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 12013507
Update posts
0 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 |
|---|---|---|
| 12013507 | 【1.0.10823】2023.8.23 Minor Bug Fixed Announcement |
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 |
|---|---|
| 23 Aug 2023 | 【1.0.10823】2023.8.23 Minor Bug Fixed Announcement Patch notes |
| 22 Aug 2023 | 【1.0 Release】Theseus Protocol is now in version 1.0. Update |
| 6 Jul 2023 | [Test version 0.9.0707] New game mode, achievement system available. Update |
| 21 Jun 2023 | 2023.6.21【Minor Bug Fixed Announcement】 Patch notes |
| 19 Jun 2023 | [Test version 0.9.0619]Major Update: Meet Antiope! Update |
| App | Players now | Latest build |
|---|---|---|
| Theseus Protocol Beta · App 2099760 | Not yet | 18177862 · |
Separate Steam apps for test, staging and playtest versions of Theseus Protocol. They have no store page, so they aren’t counted as games or releases. Builds come from Steam’s client network, players from the Steam Web API every few hours. Steam gives no count for an app nobody can launch. How we count
| 8 May 2023 | [Test version 0.8.0509]Major Update: New mode, New mechanism, New experience! 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