Cepheus Protocol

Cepheus Protocol

Halcyon Winds · May 15, 2020 · Sandbox, Zombies, RTS, Survival, Post-apocalyptic

Buy the Cepheus Protocol key for Steam from Kinguin at $3.02 — the cheapest of 5 stores we compare.

PC
Mostly Positive75% · 3,76969playing now
Best price 89 Lowest tracked
$3.02-85%
⭐ lowest tracked
Kinguin Buy at Kinguin

Prices last checked

More games under $5 →

Where to buy Cepheus Protocol — official stores

Steam
Steam
Standard Edition · Steam
$19.99
Buy
Epic Game Store
Epic Game Store
Standard Edition · Epic Games
$19.99
Buy

Cheapest Cepheus Protocol keys — keyshops

Keyshops are third-party marketplaces — keys are resold and can be region-locked or a different edition. Check the listing's region & edition before buying.

Kinguin
Standard Edition · Steam
$3.02
Buy
Driffle INC
Standard Edition · Steam
$14.29
Buy
Gameseal
Standard Edition · Steam
$14.55
Buy

Some store links are affiliate links — playze may earn a commission at no extra cost to you. It never changes the price you pay, and the cheapest confirmed price is always shown in the Best price box above.

Cepheus Protocol price by region

Cepheus Protocol costs $3.02 in the United States, $3.02 in Georgia (USD), £10.81 in the United Kingdom, €12.94 in Europe (EUR), CA$22.99 in Canada, NZ$26.49 in New Zealand, A$27.99 in Australia, R$52.99 in Brazil and zł57.10 in Poland right now.

Cheapest Cepheus Protocol offer in each region, in local currency
RegionBest priceOfficial storeKey shopStores
United Statesyour region $3.02 −85% $19.99 $3.02 5
Georgia (USD) $3.02 −66% $8.99 $3.02 5
United Kingdom £10.81 −32% £15.99 £10.81 3
Europe (EUR) €12.94 −28% €17.99 €12.94 4
Canada CA$22.99 CA$22.99 — 2
New Zealand NZ$26.49 NZ$26.49 — 2
Australia A$27.99 A$27.99 — 2
Brazil R$52.99 R$52.99 R$80.95 3
Poland zł57.10 −32% zł84.00 zł57.10 3

Each row is a real price from that region's own stores, not a currency conversion, so the figures are not directly comparable. Switch regions in the header to shop the one you buy in.

Screenshots

About Cepheus Protocol

✦ AI summary

Command CERC forces across the Bay Area in this hybrid RTS-shooter where you defend your aircraft carrier base and battle infected hordes that can turn your own units against you. Tackle the Pangu Virus pandemic solo or with up to 16 players in co-op, blending real-time strategy commanding with third-person combat while researching the alien pathogen and hunting down Patient Zero.

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

Cepheus Protocol — game info

Platforms
Windows
Steam Deck
Playable
Player modes
Single-player, Online co-op
Controller
Partial controller support
PC Game Pass
Not included

DLC & expansions

🎁 Complete the collection

Base game + 5 of 7 DLC at today's best prices (some DLC unpriced).

$21.97
to own everything

What Steam players say

Recent verbatim reviews from Steam — separate from playze.io community reviews below.

✦ AI summary

Cepheus Protocol is a real-time strategy base-building game with zombie outbreak survival mechanics that players find engaging and fun, featuring a good blend of resource management, tactical combat, and cooperative play. The main complaints center on technical stability issues like crashes, a steep learning curve due to numerous mechanics, and an ongoing development cycle that leaves the game feeling incomplete.

Not recommended Sep 23, 2026
A definate no. Put a ticket in on the official Discord but got chewed out by buffalo1137 for puting the ticket in the wrong channel when their Discord guide sent me there. Still didn't get any support though. Looks like it might be a good game when it is finished. Well, the game video on Steam makes it look good. Won't be asking for a refund because a friend bought it for me, so it was not free. Uninstalled after the 4th crash to restart the PC.
8 found this helpful
Recommended Sep 19, 2026
This game has gone through some rough development cycle but I think the dev team is now on the right track, and moving in the right direction. The pandemic mode is absolutely phenomenal. If they can polish up the game and add all the features they are promising, this could be quite a hit. Your goal is to find subject zero and put a stop to her, but while you do that you're also trying to evacuate civilians from the area, because turned civilians become your enemy, and eventually you'll find yourself overrun. So you're deploying your troops to various areas, building defenses, and a main base to evacuate people out of the area. You're also researching the virus and gaining upgrades in the process. There's a lot to unpack here but I find the game really fun and keep coming back to it once in a while to see the progress made. I'd give it a chance, I'm glad I did.
1 found this helpful
Recommended Sep 30, 2026
nice game great potential, running operations like this? the dream <3 Gimme gimme, please oh please :D a good campain would be very nice $$$
Recommended Sep 21, 2026
Really fun game, devs working on it constantly as a labor of love and it's pretty fun, highly recommend.
Recommended Sep 19, 2026
Cepheus Protocol: My Review + : 🧟 An interesting military survival setting centered on an outbreak that turns the population into infected hordes. 🎯 A successful blend of real-time strategy, base building, and combat against the infected. 🏗️ Resource management and base development add a genuine strategic dimension. 🪖 Various unit types allow you to adapt your approach based on the situation. 🔫 The ability to take direct control of certain operators adds an action-oriented element to the gameplay. 🌍 The open world offers great freedom in how you handle the outbreak and its various threats. 👥 The game can be played solo or in co-op, allowing you to enjoy the experience in different ways. - : 🧠 The number of mechanics to manage may require a bit of a learning curve. 📈 Progression and managing various units can sometimes feel quite demanding. 🔄 Sessions can become repetitive for players not particularly drawn to RTS/survival gameplay. ⚙️ As the game is still in Early Access on Steam, certain elements are still evolving. My Verdict: ⭐ Cepheus Protocol offers an interesting mix of strategy, survival, and action in a zombie-infested world. The ability to manage y…
Recommended Sep 13, 2026
Pretty neat.

Community reviews

—

0 reviews

Sign in to write a review.

No reviews yet. Be the first to review this game.

More like Cepheus Protocol

News

All news →
Games like Undertale that remember what you didPC

Games like Undertale that remember what you did

Undertale's own listing calls it the RPG where you don't have to destroy anyone. Games like Undertale that keep that idea: permanent choices, fights you can talk past, worlds that notice.

Nov 14, 2026
Games like Slay the Spire that keep the branching climbPC

Games like Slay the Spire that keep the branching climb

Most games like Slay the Spire copy the cards and lose the map. These keep the risky-or-safe choice, from a three-floor train to a deck made of poker hands.

Nov 14, 2026
Bodycam game price: what the zombie update changes about buyingPC

Bodycam game price: what the zombie update changes about buying

The Dead & Damned put Bodycam's zombies back on 13 November. What our dated record says about the Bodycam game price, and why the store's end date matters more than the sticker.

Nov 14, 2026
SilkMU is our new partner: MU Online Season 6 in a browser tabBlog

SilkMU is our new partner: MU Online Season 6 in a browser tab

SilkMU, a MU Online Season 6 server that runs in a browser tab or as an app, opened on 6 November 2026 and is now our partner. What it offers, what is free and what costs WCoin.

Nov 13, 2026
Games like Dying Light, where nightfall changes the rulesPC

Games like Dying Light, where nightfall changes the rules

Games like Dying Light are easy to find if you only want parkour or only want zombies. These eight keep the part that matters: a city that becomes a different place after dark.

Nov 13, 2026
Games like Portal 2, where one idea carries the whole gamePC

Games like Portal 2, where one idea carries the whole game

Games like Portal 2 all share one habit: teach a single impossible trick, then spend a campaign breaking it. From rewinding objects through time to Escher geometry that loops back on itself.

Nov 13, 2026
Planet Coaster DLC: skip the collection, buy the packsBundles

Planet Coaster DLC: skip the collection, buy the packs

The Planet Coaster DLC catalogue closed in 2019, so there is no curve left to wait out. Our record shows the collection bundle costs far more than assembling the same packs one by one.

Nov 13, 2026
Toxic Commando Game Pass: subscribe, or buy the key?Xbox

Toxic Commando Game Pass: subscribe, or buy the key?

The Toxic Commando Game Pass add landed on 12 November. Our price record since late September shows the key route barely moved, which changes what a subscription is worth.

Nov 13, 2026

Top games right now

All rankings →
  1. 1Counter-Strike 2Free
  2. 2Dota 2Free
  3. 3PUBG: BATTLEGROUNDSFree
  4. 4Grand Theft Auto V Legacy—
  5. 5Terraria$2.11
  6. 6Tom Clancy's Rainbow Six SiegeFree
  7. 7Rust$20.19
  8. 8Garry's Mod$6.19
  9. 9Team Fortress 2Free
  10. 10Black Myth: Wukong$35.72
  11. 11HELLDIVERS™ 2$23.99
  12. 12ELDEN RING$38.88
  13. 13Apex Legends™Free
  14. 14Left 4 Dead 2$9.99
  15. 15Stardew Valley$12.11
  16. 16Wallpaper Engine$3.99
  17. 17Cyberpunk 2077$17.99
  18. 18Euro Truck Simulator 2$4.99
  19. 19Dead by Daylight$6.81
  20. 20Red Dead Redemption 2$12.97
  21. 21The Witcher 3: Wild Hunt$9.77
  22. 22Baldur's Gate 3$53.53
  23. 23Phasmophobia$15.60
  24. 24War ThunderFree