| App Type | game |
| Early Access | May 15, 2020 |
| Release Date | Unknown |
| Details Last Modified | August 29, 2026 (1 month ago) |
| Developer | Halcyon Winds |
| Publisher | Halcyon Winds |
| Genres |
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| Supported Systems | Windows |
| Price | $19.99 |
| Required Age | 0+ |
| Recommendations | 2,966 |
| Achievements | 5 |
| DLC Available | 7 |
| Packages | 2 |
| Website | https://cepheusprotocol.com/ |
| Support | https://discord.com/invite/YQjFpW4hEY |
| Support Email | support@halcyonwinds.com |
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.
Adjustable DifficultyAdjustable Text SizeCamera Comfort
Co-opCustom Volume Controls
Family Sharing