Contagion isn't your average Zombie Shooter but instead takes a more realistic and different approach to the popular genre with unique characters, environments, weapons, items, and a built in system that makes every round completely unpredictable with resources, objectives, and paths ever changing.

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 21184695
Update posts
1 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 |
|---|---|---|
| 21184695 | 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. How we count
| Posted | Update |
|---|---|
| 8 Nov 2025 | Small patch: 2.3.0.1.7 Patch notes |
| 19 Aug 2025 | Quick Hotfix: 2.3.0.1.6 Patch notes |
| 5 Aug 2025 | Quick Hotfix: 2.3.0.1.5 Patch notes |
| 1 Aug 2025 | Quick Hotfix: 2.3.0.1.4 Patch notes |
| 27 Jul 2025 | Quick Hotfix: 2.3.0.1.3 Patch notes |
| 26 Jul 2025 |
| Hotfix: 2.3.0.1.2 Patch notes |
| 9 Apr 2025 | Small patch: 2.3.0.1.1 Patch notes |
| 1 Apr 2025 | April Fools Update: The Zombie Heist Update |
| 31 Dec 2024 | Small patch: 2.3.0.0.9 Patch notes |
| 26 Dec 2024 | Small patch: 2.3.0.0.8 Patch notes |
| 24 Dec 2024 | Small patch: 2.3.0.0.7 Patch notes |
| 19 Dec 2024 | Small patch: 2.3.0.0.6 Patch notes |
| 8 Dec 2024 | Small patch: 2.3.0.0.5 Patch notes |
| 3 Dec 2024 | Small patch: 2.3.0.0.4 Patch notes |
| 23 Nov 2024 | datacenter console spam fix Patch notes |
| 23 Nov 2024 | Small patch: 2.3.0.0.3 Patch notes |
| 19 Nov 2024 | Small patch: 2.3.0.0.2 Patch notes |
| 15 Nov 2024 | Quick patch: 2.3.0.0.1 Patch notes |
| 20 Sept 2024 | Small patch: 2.2.1.24 Patch notes |
| 12 Jun 2024 | Small patch: 2.2.1.23 Patch notes |
| 9 Jun 2024 | Small patch: 2.2.1.22 Patch notes |
| 5 Jun 2024 | Small patch: 2.2.1.21 Patch notes |
| 3 Jun 2024 | Small patch: 2.2.1.20 Patch notes |
| 31 May 2024 | Small patch: 2.2.1.19 Patch notes |
| 29 Mar 2024 | Small patch: 2.2.1.18 Patch notes |
| 6 Mar 2024 | Patch Version: 2.2.1.17 Patch notes |
| 26 Feb 2024 | Patch Version: 2.2.1.16 Patch notes |
| 22 Feb 2024 | Patch Version: 2.2.1.15 Patch notes |
| 19 Feb 2024 | Patch Version: 2.2.1.14 Patch notes |
| 15 Feb 2024 | Super Small Hotfix Patch notes |
| 7 Jul 2023 | Hotfix: 2.2.1.10 Patch notes |
| 25 Jun 2023 | Hotfix: 2.2.1.9 Patch notes |
| 11 Apr 2023 | Hotfix: 2.2.1.8 Patch notes |
| 29 Mar 2023 | Patch: 2.2.1.7 Patch notes |
| 26 Mar 2023 | Patch: 2.2.1.6 Patch notes |
| 24 Mar 2023 | Hotfix 2.2.1.5 Patch notes |
| 24 Mar 2023 | Patch 2.2.1.4 Patch notes |
| 18 Mar 2023 | Private lobbies hotfix Patch notes |
| 18 Mar 2023 | Hotfix: 2.2.1.3 Patch notes |
| 20 Jun 2022 | Small Update: 2.2.1.1 Patch notes |
| 6 May 2022 | Small Update: 2.2.1.0 Patch notes |
| 29 Apr 2022 | Small Update: 2.2.0.9 Patch notes |
| 27 Apr 2022 | Small Update: 2.2.0.8 Patch notes |
| 14 Apr 2022 | Quick Hotfix v2.2.0.7 Patch notes |
| 10 Apr 2022 | Quick Hotfix v2.2.0.6 Patch notes |
| 25 Jan 2022 | Small Update: 2.2.0.4 Patch notes |
| 30 Dec 2021 | End of The Year Small Update Patch notes |
| 15 Nov 2021 | Quick Hotfix v2.2.0.2 Patch notes |
| 12 Nov 2021 | Small Update: 2.2.0.1 Patch notes |
| 28 Oct 2021 | Client Hotfix Patch notes |
Showing the latest 50 of 150. Show all
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