TIS-100 is an open-ended programming game by Zachtronics, the creators of SpaceChem and Infinifactory, in which you rewrite corrupted code segments to repair the TIS-100 and unlock its secrets. It’s the assembly language programming game you never asked for!

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 14149786
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 |
|---|---|---|
| 14149786 | UPDATE: Fixing missing leaderboards |
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 Apr 2024 | UPDATE: Fixing missing leaderboards Patch notes |
| 14 Nov 2020 | UPDATE: Fixing the crash handler and histograms Patch notes |
| 27 Nov 2017 | UPDATE: Unexpected bug fixes Patch notes |
| 13 Jul 2015 | UPDATE: Monday morning bug fixes Update |
| 12 Jul 2015 | UPDATE: TIS-NET directory, achievements, and more! Update |
| 28 Jun 2015 |
| UPDATE: Bug fixes for the specification editor Update |
| 16 Jun 2015 | UPDATE: Create your own puzzles in the SPECIFICATION EDITOR! Update |
| 9 Jun 2015 | UPDATE: Optimization tools, new puzzles Update |
| 5 Jun 2015 | UPDATE: Small improvements Update |
| 5 Jun 2015 | UPDATE: OS X, Linux, and fullscreen! Update |
| 4 Jun 2015 | UPDATE: More bug fixes, UI improvements Update |
| 3 Jun 2015 | UPDATE: Bug fixes, new test routines 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