Cepheus Protocol Patch Notes — May 31, 2026
Aggregated from Steam, cross-tracked with Battle.net coverage on GamePatchNote.
The virus is loose across the Bay Area. Flashpoints are erupting across the peninsula as entire districts fall into chaos and infected swarms push deeper into civilian zones.
CERC forces are already in the field.
Embedded military reporters and frontline operators are transmitting battlefield coverage directly from active operations. The images you are about to see were captured during recent combat deployments across the region.
These transmissions come directly from the front.
The battle for the Bay Area has begun.
2026.5.30.6.2 Hotfix Change list:
Fixed Infection Count going negative during live gameplay
Fixed a Save/Load issue where Infected Count could reset to 0
Improved Infection counter to count active and inactive infection including Chelsey into the base count.
The last major update
The Next 60 Days of Cepheus Protocol...
Civilian Evacuation is now playable from start to finish, and today’s update is focused on hotfixes, cleanup, and what comes next for the Rebuild.
If you missed yesterday’s post covering one of the biggest updates to ever touch the Cepheus Protocol Rebuild, you can read it here:
CERC HQ EP 91 Summary:
The evacuation system just hit a major milestone. For the first time, players can now play through the entire civilian rescue loop from beginning to end. This includes fully functional intake processing, evacuation buses, infection scanning upgrades, doctrine progression, and direct civilian movement into evacuation zones.
New doctrine upgrades now let you streamline processing, skip holding cells, and massively improve evacuation efficiency as your operation grows.
The infected are also getting a major overhaul. Infection spread has been rebalanced, structure construction is now visible before activation, and the late game is being tuned to reduce the frustrating “whack-a-mole” pressure players were running into. Endless Horde Mode is now available as a custom option for players who want the infection to spread forever.
Vehicle pathfinding, helicopters, gates, airstrikes, radio systems, and multiplayer syncing all received major fixes this week. The team also reworked a large number of save/load issues, improved performance for large sessions, and added better RTS management tools for handling evacuation zones and civilian flow.
Next up is a full push on formation AI, infected intelligence, new infected variants, infected lieutenants(Her Operators), Infected Leviathan (Late game super unit), Operator improvements, and the massive San Francisco North map expansion.
The goal over the next 60 days is to push every major gameplay system far beyond what existed ever before.
You can catch up on the latest CERC HQ below if you want to see the full breakdown for yourself:
The Next 60 Days
Over the next 30 to 60 days, the focus is pushing every major gameplay system forward beyond what existed before in the original build.
Civilian Evacuation polish and bug fixing
Formation AI improvements
Infected intelligence improvements
New infected variants
Lieutenants and late-game infected progression
Leviathan progression
Operator improvements
San Francisco North expansion work
RTS control improvements
Save/load and multiplayer stability improvements
Civilian Evacuation Progress
The evacuation system has reached a major gameplay milestone.
Players can now complete the full civilian rescue loop from intake to evacuation, with supporting systems now coming online around it.
Functional intake processing
Evacuation buses
Infection scanning upgrades
Doctrine progression
Direct civilian movement into evacuation zones
Upgrades to streamline civilian processing
Options to skip holding cells
Improved evacuation efficiency as your operation grows
Infected Rework
The infected are also receiving a major pass as part of this phase of development.
Infection spread has been rebalanced, infected structure construction is now visible before activation, and late-game pressure is being tuned to reduce the frustrating “whack-a-mole” feeling players were running into.
Endless Horde Mode is also available as a custom option for players who want the infection to keep spreading forever.
What Comes Next
The next major push is about taking the systems now coming online and making them stronger, smarter, and more stable.
Expect continued work on formation AI, infected behavior, new infected threats, Operator improvements, San Francisco North, evacuation polish, and the broader late-game progression loop.
As always, Experimental builds may contain rough edges, bugs, and unfinished content. Player reports are extremely helpful as these systems continue moving toward the default branch.
🎙️ Next CERC HQ – Livestream Details
🕔 When: Weekly Saturdays – 7 PM EST (New Time!)
💬 What is CERC HQ:
Welcome to Cepheus Protocol HQ, your ultimate weekly briefing on all things Cepheus Protocol! Join the Halcyon Winds team as we explore the latest updates, reveal behind-the-scenes development stories, and answer community questions about the game. From exciting new features to design challenges, this is your all-access pass to the evolving world of Cepheus Protocol. Tune in every week and stay ahead of the outbreak!
Co-op Progress
Total Revamp based on Community Feedback
Level Design Updates
📺 Where to Watch:
🎤 Don’t miss our Live Q&A! We’ll be answering questions from the community during the stream.
📺 Missed a Stream? No Worries!
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