You are a disease. Infect the human body as a lone pathogen in this cellular roguelike shooter. Collect organelles to evolve your parasite in a microscopic arms race against your host's immune system. Conquer a beautiful, procedurally generated world of tiny proportions.

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 26246620
Update posts
18 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
10 hoursMiddle gap across the last 8 builds we saw
| Build | Went live | Patch notes |
|---|---|---|
| 26246620 | Patch 1.3.19 - One More Update! | |
| 26184908 | None posted | |
| 26184024 | None posted | |
| 26125386 | None posted | |
| 26121648 | None posted | |
| 26114442 | None posted | |
| 26112064 | None posted | |
| 26095853 | None posted |
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.
| Posted | Update |
|---|---|
| 6 Oct 2026 | Patch 1.2.0 - A Ton of Fixes Update |
| 7 Aug 2026 | New Patch: Balancing Adjustments Update |
| 2 Aug 2026 | More Updates + The Demo Returns! Update |
| 22 Jul 2026 | Post-Launch Update: Addressing Player Feedback Update |
| 30 Apr 2026 | Biweekly Update 11: UX Improvements Update |
| App | Players now | Latest build |
|---|---|---|
| Pathogenic Playtest · App 3940740 | 0 | 23941626 · |
Separate Steam apps for test, staging and playtest versions of Pathogenic. 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
| 16 Apr 2026 |
| Biweekly Update 10: Adaptive Immunity Update |
| 26 Mar 2026 | Biweekly Update 09 - Community Suggestions Update |
| 12 Mar 2026 | Biweekly Update 08 - Improving the Levels Update |
| 26 Feb 2026 | Biweekly Update 07 - Polishing Time Update |
| 12 Feb 2026 | Biweekly Update 06: Intestine Update |
| 29 Jan 2026 | Biweekly Update 05 - Edit Your Start! Update |
| 15 Jan 2026 | Biweekly Update 04 - Multi-Hit Attacks! Update |
| 18 Dec 2025 | Biweekly Update 03 - The Swarm Update |
| 4 Dec 2025 | Biweekly Update 02 - High Voltage Update |
| 20 Nov 2025 | Biweekly Update 01 - More Firepower Update |
| 3 Nov 2025 | Pathogenic Demo 0.9 Hotfix 2 Patch notes |
| 2 Nov 2025 | Pathogenic Demo 0.9 Hotfix Patch notes |
| 7 Oct 2025 | Patch Notes for Demo v0.7 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