Cepheus Protocol Early Access −20%

Cepheus Protocol is an Open World RTS Military Survival Game. Play as the CERC hunting Patient 0, maintain Quarantine camps, fight dangerous mutations & Rogue Civilian Combatants . There’s nobody else coming, it’s up to you now.

Developer: Halcyon Winds
Released: 15 May 2020
Price: $15.99 ~~$19.99~~
Platforms
Followers: 22,090
Steam Deck: Playable
Languages: English +8
Controller: Partial
Series: Cepheus Protocol

Patch announcements

0 posts

Posts the developer tagged as patch notes

Last 90 days · as of 20 Oct, 00:11 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 20 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

2026.9.4 Experimental Patch Notes & September Development Update
4 Sept 2026 · Community Announcements
2026.8.21.1 Experimental Patch Notes & August Development Update
21 Aug 2026 · Community Announcements
2026.8.13.1 Now Out: Final Push to Escalation
13 Aug 2026 · Community Announcements
2026.8.4.1 + 4.2 Experimental and Normal Patch Notes
5 Aug 2026 · Community Announcements
2026.7.31.3 Quality of Life Update Live + GPU Fog of War Tonight on Experimental
1 Aug 2026 · Community Announcements
2026.7.27 CERC OPS Arrives on Experimental Plus Major Fixes
28 Jul 2026 · Community Announcements
World Reveal of CERC Ops This Saturday!
24 Jul 2026 · Community Announcements
Massive Performance Gains and Smarter Fog of War Are Coming
20 Jul 2026 · Community Announcements
2026.7.11 AI, Performance & Helicopter Systems Update on Experimental
12 Jul 2026 · Community Announcements
2026.6.19.5 Discord Integration Fixes + Launcher
20 Jun 2026 · Community Announcements

From the game’s Steam news feed, last checked 20 Oct, 00:11 UTC. An announcement is not a build: games can update without posting. Every public build we saw is on the Builds tab.