Cepheus Protocol

Cepheus Protocol cover art -27%
Genres
Action, Adventure, Indie, Massively Multiplayer, RPG, Simulation, Strategy, Early Access
Released
15 May, 2020
Developer
Halcyon Winds
Publisher
Halcyon Winds

Where will you play?

2 stores compared

  1. G2ABest priceSteam key · Global -27% $14.67 $19.99 Get Deal
  2. Steam $19.99 Get Deal

Cepheus Protocol price history

£10.99 today90-day low £10.99 (27 Oct 2026)Lowest recorded £10.9990-day average £10.99

£10.88£10.99£11.10 27 Oct 2026Today £10.88£10.99£11.10 27 Oct 2026Today

Today's price is the lowest we've seen in the last 90 days. Cheapest UK-working PC key across the stores we compare, any edition; tracked since 27 Oct 2026.

$14.67 today90-day low $14.67 (27 Oct 2026)Lowest recorded $14.6790-day average $14.67

$14.53$14.67$14.81 27 Oct 2026Today $14.53$14.67$14.81 27 Oct 2026Today

Today's price is the lowest we've seen in the last 90 days. Cheapest US-working PC key across the stores we compare, any edition; tracked since 27 Oct 2026.

€13.11 today90-day low €13.11 (27 Oct 2026)Lowest recorded €13.1190-day average €13.11

€12.98€13.11€13.24 27 Oct 2026Today €12.98€13.11€13.24 27 Oct 2026Today

Today's price is the lowest we've seen in the last 90 days. Cheapest Europe-working PC key across the stores we compare, any edition; tracked since 27 Oct 2026.

About this game

An Open World RTS Military Survival Game. Command CERC (Center for Epidemic Research and Control) to stop a pandemic-level event from consuming the Bay Area. The Pangu Virus threatens humanity as it spreads, turning native inhabitants into infected, relentless swarms. Can you adapt, survive, and reclaim control?

Hardcore RTS Military Combat Meets Survival Horror

Aircraft Carrier Operations

Your mobile base of operations in Pandemic Mode. If it’s destroyed, you lose. Defend it at all costs and utilize Winters, now a rebuildable hero, to lead your forces.

A New Threat Rises

Battle infected hordes that can infect and turn your own units. Command land, sea, and air forces to hold the line in this unforgiving world.

Co-Op Multiplayer up to 16 players in true RTS/TPS hybrid combat!

Share control of CERC operations with up to 16 players. Pool resources, coordinate tactics, and fight as a team against the infection.

Dynamic Gameplay Systems

Command the Operator

Control the battlefield in Third-Person Shooter mode or use the Operator as a hero unit in RTS mode. Adapt your strategies to survive.

Doctrine Tree Progression

Unlock new support options, powerful weapons, and unique units by leveling up through the Doctrine tree.

Customize Pandemic Mode

Create your perfect challenge. Turn off infected types, adjust gameplay options, and create custom scenarios to tailor the experience.

Character Progression

Improve your characters’ health and targeting efficiency as they gain experience through combat.

Innovative Mechanics and Features

Line of Sight and Hearing AI

Experience cutting-edge AI that hunts your units based on what they can see and hear. Stay stealthy, or face overwhelming swarms.

Massive, Detailed Maps

Explore sprawling urban environments filled with varied locales. Plan every attack, defense, and civilian evacuation carefully to ensure survival.

Dynamic Civilian Diplomacy (Legacy Only Coming in Q2 to rebuild)

Interact with rogue civilian groups. Recruit them to your cause, negotiate alliances, or defend yourself from hostile factions.

Civilian Evacuation (Legacy Only Coming in March to rebuild)

Manage who lives and dies with an intricate Civilian Administration Structure. Customize your intake system or use preset templates to make critical decisions.

Destroy the Infection

Research the Pangu Virus

Delve into the secrets of the alien pathogen and find a way to kill Patient 0 before it’s too late.

Hunt Patient 0 and Their Lieutenants

Stop the infection from spreading by targeting its leaders. Destroy their expanding hordes before they consume every province.

Dynamic Provincial Events

Encounter unexpected challenges as rogue civilian combatants and infected groups form dynamically across the map. Your reputation and decisions will shape the world around you.

Enhanced Operator Customization

Tailor weapons, abilities, and appearance. Drive vehicles, gain progression perks, and refine your playstyle for maximum impact.

Planned Features

DNA Research System

Develop a proper progression tree to counter the virus, protect your units, and evolve your strategies.

Canon Campaign Mode

Experience the official Cepheus Protocol story, inspired by the novel and side stories

Trailer

Screenshots

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Screenshot
Use the ← → keys

PC system requirements

Minimum

OS
Windows 10/11 (64-bit)
Processor
Intel® Core™ i5-4500K
Memory
8 GB RAM
Graphics
NVIDIA GeForce 1060 GTX or AMD Radeon Equivalent 4 GB
DirectX
Version 12
Storage
8 GB available space
Sound Card
Direct X Compatible
Additional Notes
**recommended SSD install for optimal performance

Recommended

OS
Windows 10/11 (64-bit)
Processor
Intel® Core™ i7-6770K / AMD Ryzen 5 1500X
Memory
16 GB RAM
Graphics
NVIDIA GeForce 2060 GTX or AMD Radeon Equivalent 6GB VRAM
DirectX
Version 12
Storage
8 GB available space
Sound Card
Direct X Compatible
Additional Notes
**recommended SSD install for optimal performance

Cepheus Protocol prices: questions & answers

What is the cheapest Cepheus Protocol price for PC?

The cheapest Cepheus Protocol PC key right now is £10.99 at G2A, 27% below the usual price. We compare 2 offers from 2 stores for PC, and prices update at least twice a day.

Cheapest price today: £10.99 at G2A (27% off, usually £17.75). We compare 2 stores for Cepheus Protocol, and prices update at least twice a day. Prices can change; the store's checkout price is final. Platform and region details come from each store's listing; the store's product page is final. Zemly may earn a commission if you buy through links on this site, at no extra cost to you (affiliate disclosure).