Cepheus Protocol
PC (Microsoft Windows)

Cepheus Protocol

#Real Time Strategy (RTS)

About

Find patient zero before an alien virus takes over San Francisco and the cepheus protocol is enacted. Command your squad, save civilians, and stop the Pangu virus. Kill patient zero and save the world.

Storyline

Cepheus Protocol is an open world RTS military survival game. You play as CERC, hunting Patient Zero while keeping quarantine camps alive. Hold the line against brutal mutations and rogue civilian combatants. No reinforcements. No backup. It is on you.

Playtime Estimates

Main Story-
Main + Extra-
Completionist2.3h
All Styles2.3h
Confidence: 100%Updated: 9/20/2026

Live Prices & Deals

Current store offers for selected market.

Source: No offers

Multiplayer

Online Max16 players
Online Co-opYes

Languages

LanguageSupport
EnglishAudio
Chinese (Simplified)Interface
KoreanSubtitles
GermanSubtitles
RussianInterface
FrenchInterface
EnglishSubtitles
Chinese (Simplified)Subtitles
JapaneseSubtitles
Spanish (Spain)Interface
FrenchSubtitles
EnglishInterface
KoreanInterface
GermanInterface
JapaneseInterface
Spanish (Spain)Subtitles
RussianSubtitles
Portuguese (Portugal)Interface
Portuguese (Portugal)Subtitles
Portuguese (Brazil)Interface

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Game Info

Release Date5/15/2020
DeveloperHalcyon Winds
PublisherHalcyon Winds
PlatformsPC (Microsoft Windows)
GenresReal Time Strategy (RTS), Simulator, Strategy, Adventure, Indie

Game Modes

Single player
Multiplayer
Co-operative

Themes

Action
Survival

Release Dates

PC (Microsoft Windows)May 15, 2020