Cepheus Protocol

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.

Developer: Halcyon Winds.

Tags: Solo · Co-op, Sandbox, Zombies, RTS.

Steam reviews: Mostly Positive (79% of 3,032).

Price: $19.99.

Released 2020-05-15.

Last updated 2026-08-05.

Cepheus Protocol on Game Goose · Steam store page

Find more PC games on Game Goose.