Cepheus Protocol
Playing now
63−15 vs. yesterday
17%of peak
All-time peak
378Oct 2021
Update cadence · public branch
PICS live
17 days
Since last public build
—
Median interval
Usually Thu, 20:00–22:00 UTC
1
Builds in 30 days
0 with patch notes · 1 unannounced
—
Downloaded in 30 days
Not quiet · on schedule
All 8 builds since 2025 · UTC
When Halcyon Winds ships
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FewerMorePeak cell: Tue 10:00 · 1 builds
5 published · from the developer’s Steam news feed
Patch notes
| Published | Title | Build |
|---|---|---|
| 2026.7.31.3 Quality of Life Update Live + GPU Fog of War Tonight on Experimentalmajor THE BAY AREA IS COLLAPSING. The virus is loose across the peninsula. Flashpoints are erupting across the region 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 wer… | 24503965 | |
| 2026.6.8.2 Civilian Evacuation Live On Publicmajor Civilian Evacuation Is Now Live On Public Civilian Evacuation has now moved from Experimental into the default Public install of Cepheus Protocol. For the last few weeks, players have been able to test the system on Experimental while we continued working through the core loop, save/load behavior, multiplayer support, civilian flow control, intake behavior, and the wider session reliability iss… | 23630832 | |
| 2026.5.30.6.2 : Hotfix 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 c… | 23497255 | |
| 2026.5.22.9 Experimental Civilian Evacuation Preview, SF North Live |
Cepheus Protocol
Builds
| Date | Day | Time | Patch title | Build ID | Branch | Depots | Download Δ |
|---|---|---|---|---|---|---|---|
| 6 Sep 2026new | Sun | 15:22 | No patch notes · unannounced build | 25145247 | experimental | 1 | — |
| 5 Sep 2026 | Sat | 20:12 | No patch notes · unannounced build | 25144781 | bork | 8 | — |
| 4 Sep 2026 | Fri | 16:25 | No patch notes · unannounced build | 25127441 | experimental | 1 | — |
| 3 Sep 2026 | Thu | 11:39 | No patch notes · unannounced build | 25100274 | experimental | — | — |
| 1 Sep 2026 | Tue |