Update history
Latest Cepheus Protocol updates
Search patches, hotfixes, and dev posts. Load more to keep browsing the timeline.
Browse updates
Published changes
Search updates. Filter by source or date. Open any row for the full patch notes, or load more to continue the timeline.
- Cepheus Protocol
First 48 Hours After the Rebuild Merge | Patch Notes 2026.1.9.2
The rebuild is now the default version of Cepheus Protocol, and the first 48 hours gave us exactly what we needed: a real stress test at scale. Discord playtests help, internal testing helps, but nothing compares to tho…
Store57 changesFixServer - Cepheus Protocol
The Rebuild Is Now the Main Game (Build Switch Update)
TLDR The Rebuild is now the standard installed version of Cepheus Protocol. The old version is now called Legacy, and it remains available as a Beta option. This rebuild was done to restore stability, improve performanc…
Patch notes26 changesServerCompatibility - Cepheus Protocol
Development Update – Vehicles, Systems Progress, and What’s Coming Next
Everything in This Post Is Playable Right Now in the Private Playtesting Branch Before diving in: everything outlined below is already live and playable if you opt into the Private Playtesting branch on Steam. No passwo…
Event24 changesGameplayServer - Cepheus Protocol
Patch Notes 2025.11.23.2 - public-playtest - Custom Game options now in!
Patch Notes: Custom Game Options added to Pandemic it supports the following: Steam post image Some Infected configurables Steam post imageWe also added a new "presets" directory on our workshop expanding support for sh…
Event65 changes1 numericFix - Cepheus Protocol
Patch Notes 2025.11.7 - public-playtest Treasure Island Now playable!
Patch Notes: [carousel autoadvance="true"] [/carousel] If a unit is inside a vehicle and it dies and it will land in an unnavigable space by falling it will now kill that unit Improved the damage calculation to make uni…
Event66 changesFixBalance - Cepheus Protocol
The Battle of Half Moon Bay
A few times each week, our developers host public multiplayer sessions where we jump into the chaos ourselves—testing, refining, and showcasing the true state of the game. These sessions are open for everyone to join, c…
Store8 changesServerMaps
