About This Game
Special Announcement: Opt Into Cepheus Protocol Experimental Builds
Be the first to experience cutting-edge features and updates by opting into Cepheus Protocol Experimental Builds!
What You'll Get:
Early access to new gameplay mechanics, systems, and features.
A chance to provide feedback that shapes the future of Cepheus Protocol.
A sneak peek at upcoming content and improvements before they hit the main build.
How to Opt-In:
Buy/Own the Base Game of Cepheus Protocol
Go to your Steam Library.
Search for Cepheus Protocol Experimental Branch.
Install and have fun!
Roadmap
Explore the future of Cepheus Protocol! Discover upcoming features like Doctrines, the DNA Research System, Operator Units, and Co-op Mode. Stay informed with all updates by visiting our full roadmap on our website.
About the 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.
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
Interact with rogue civilian groups. Recruit them to your cause, negotiate alliances, or defend yourself from hostile factions.Civilian Evacuation
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.
Planned Features
Enhanced Operator Customization
Tailor weapons, abilities, and appearance. Drive vehicles, gain progression perks, and refine your playstyle for maximum impact.DNA Research System
Develop a proper progression tree to counter the virus, protect your units, and evolve your strategies.Improved AI Logic
Refine the behavior of infected Lieutenants and AI to challenge extreme turtle strategies.Co-Op Multiplayer
Share control of CERC operations with up to four players. Pool resources, coordinate tactics, and fight as a team against the infection.Canon Campaign Mode
Experience the official Cepheus Protocol story, inspired by the novel and side storie
Get This Game
View on SteamUser Reviews
Game Details
Platform Support
Media






























Similar games

After Long Night
by Jiangzuogongfang Shanghai Game Co.,Ltd
$8.99
After Long Night is a sandbox survival RTS. Build and fortify your base, scavenge every corner for vital resources, craft deadly weapons, and raise a militia to fight off relentless zombie hordes that strike every night. In this world, scavenging isn't just survival—it's strategy, power and war.

Project Zomboid
by The Indie Stone
$13.39
Project Zomboid is the ultimate in zombie survival. Alone or in MP: you loot, build, craft, fight, farm and fish in a struggle to survive. A hardcore RPG skillset, a vast map, massively customisable sandbox and a cute tutorial raccoon await the unwary. So how will you die? All it takes is a bite..

Infection Free Zone
by Jutsu Games
$18.74
Choose any real region from the world. Choose your base of operations, then rebuild and readapt the buildings around you to create a self-sustaining settlement. Take charge of a group of survivors from your city. And when the night falls - Defend the zone from the infected!

Rem Survival
by Immortal Hand Studios
$10.39
Tackle starvation, dehydration, thermal conditions, radiation poisoning, and toxic gas inhalation while trying to keep your sanity intact. Shack up, cook some chicken, and make friends or enemies as you discover, explore, learn, build, and develop your skills needed for a true survival experience.

Pathogen: Code Omega
by Pandemic Forge
$3.59
Survive on an island overrun by zombies, destroy infected nests with molotovs to collect samples, and signal for rescue before it’s too late.

Infectonator: Survivors
by Toge Productions
$0.99
"Infectonator : Survivors" is a Randomized Permadeath Survival Simulator that combines RTS, Tower Defense, Roguelike, and Management-Simulation gameplay. The goal is to lead a group of survivors in a struggle to stay alive and find rescue in a zombie apocalyptic world.

Gravehold: Survival
by Obsidian Core
$9.99
A deadly virus wiped out civilization. Now, survivors must build bases, set traps, and fight endless waves of zombies to stay alive.

Zombie Survival Game Online
by Zombie Survival Game Online LLC
$4.99
Zombie Survival Game Online is an open-world, post-apocalyptic, looter shooter. Craft, quest, explore, build, and fight for survival. Parkour up a mountainside, ramp a truck over a horde, and grab a gasmask to explore the sewers. Can you survive? Doubtful.

Survivalist: Invisible Strain
by Bob
$7.79
It's ten years since the infection started. Long-established settlements are collapsing, one by one, for unknown reasons. Survivors are running to the hills to escape, hoping for safety in remote places. As another refugee, you're here to carve out a new life for yourself - by any means necessary.

Unturned
by Smartly Dressed Games
You're a survivor in the zombie infested ruins of society, and must work with your friends and forge alliances to remain among the living.

ZEPHON
by Proxy Studios
$29.99
From the developers of Warhammer 40,000: Gladius, ZEPHON is a post-apocalyptic 4X strategy game built on Proxy’s unique tactical combat system. Guide survivors through a turbulent future, navigating unexpected disasters, eldritch horror and cyberpunk monstrosities. What will you do to survive?

Survive the Nights
by a2z Interactive
$7.99
Survive the Nights is a unique FPS survival game focusing on teamwork, fortification, creativity & strategy. Secure a structure or roam free, the choice is yours. Gameplay focuses on realistic survival, post zombie infestation. Prepare during the day for nightfall. How many nights will you survive?

Yet Another Zombie Survivors
by Awesome Games Studio
$8.24
The Horde is coming but you're ready to fight it! Assemble your team and decide upon their enhancements to find the most efficient synergies against thousands of the undead. Survive. Then evolve. Then break all the limits in this deceivingly simple but addictive reverse bullet hell.