Cepheus Protocol
2020
69Recommended
75Steam
Early Access since May 2020
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.
PlatformsPC
GenreSimulation Real-time strategy Survival
Art styleRealistic
ModesSingle-player Online co-op One copy is enough
EnglishVoice-over and text
Player score75% · 4 K reviews
Playing now~62 on Steam
Time to beatHowLongToBeat ↗
Release date2020
Steam price$19.99
DeveloperHalcyon Winds
PublisherHalcyon Winds
Key tagsSandbox Zombies RTS Post-apocalyptic Diplomacy Survival Building Gore
Major updates
2026.7.31.3 Quality of Life Update Live + GPU Fog of War Tonight on Experimental · Aug 2026All 5
- 2026.7.31.3 Quality of Life Update Live + GPU Fog of War Tonight on Experimental
- 2026.6.8.2 Civilian Evacuation Live On Public
- 2026.5.22.9 Experimental Civilian Evacuation Preview, SF North Live
- 2026.01.30.3 Doctrines Have Arrived (Shared Progression Is Now Live)
- The Rebuild Is Now the Main Game (Build Switch Update)
System requirements
Minimum GeForce 1060 · 8 GB RAM · 8 GBiSteam Deck PlayableMin & recommended
| Minimum | Recommended | |
|---|---|---|
| OS | Windows 10/11 (64-bit) | Windows 10/11 (64-bit) |
| Processor | Intel® Core™ i5-4500K | Intel® Core™ i7-6770K / AMD Ryzen 5 1500X |
| Memory | 8 GB | 16 GB |
| Graphics | NVIDIA GeForce 1060 GTX or AMD Radeon Equivalent 4 GB | NVIDIA GeForce 2060 GTX or AMD Radeon Equivalent 6GB VRAM |
| DirectX | 12 | 12 |
| Storage | 8 GB | 8 GB |
From the game’s Steam store page.
