Cepheus Protocol — cheap CD keys, compare prices
Is it worth buying?
- Reviews are solid. (Steam 75%)
- The price is well above its low (was €7.29) — worth waiting for a drop or setting an alert. Notify me on a drop →
Estimate based on public reviews (Metacritic/Steam) and price history — the final call is yours.
About the game
An open-world real-time military survival strategy where, as the CERC force, you hunt Patient Zero. You maintain quarantine camps and fight dangerous mutations and rogue combatants while trying to contain the outbreak.
Did you know?
The game is independently developed and published by Halcyon Winds and has been available in early access on Steam since 2020.
Best price today
€13.90
all-time low: official €16.39 · keyshop €7.29 (+91%)
On Steam: €16.39 — you save 15% here
The cheapest Cepheus Protocol key right now costs €13.90 at K4G — the best of 6 compared offers. The lowest price we have recorded for this game: €7.29. The cheapest official store price is €16.39 at Steam.
The average low over the past 5 months was €8.60.
↳ chosen by the region label on the key — not a guarantee
Prices as of
K4G Marketplace
Steam Official store
Epic Official store
No offers match these filters — try widening them.
Listed seller price shown — payment fees may vary by method.
Cepheus Protocol prices by store 5
| Store | Type | Price |
|---|---|---|
| K4G | Marketplace | €13.90 |
| Driffle | Marketplace | €15.18 |
| Steam | Official store | €16.39 |
| G2A | Marketplace | €16.57 |
| Epic | Official store | €17.99 |
Lowest — official stores
€16.39
Jul 2026
Lowest — keyshops
€7.69
Jul 2026
Price history
last 89 daysMonthly price lows
| Month | Lowest official | Lowest keyshop |
|---|---|---|
| Oct 2026 | €16.39 | €10.78 |
| Sept 2026 | €17.99 | €7.89 |
| Aug 2026 | €16.39 | €9.33 |
| Jul 2026 | €16.39 | €7.69 |
| Jun 2026 | €17.99 | €7.29 |
Lowest in-stock price per month from our price history; the current month is the low so far.
How to activate your key
- Steam key — open the Steam client → Games → Activate a Product on Steam → enter the key. Stores with this activation: K4G, Driffle, Steam, G2A
- Epic key — open Epic Games Launcher → profile (top right) → Redeem Code → enter the key. Stores with this activation: Epic
Price alert Catch alert Price alert
Confirm in our Telegram bot — no account, no spam.
All-time low so far: €7.29
System requirements
| Minimum | Recommended | |
|---|---|---|
| OS | Windows 10/11 (64-bit) | Windows 10/11 (64-bit) |
| Processor | Intel® Core™ i5-4500K | Intel® Core™ i7-6770K / AMD Ryzen 5 1500X |
| Memory | 8 GB RAM | 16 GB RAM |
| Graphics | NVIDIA GeForce 1060 GTX or AMD Radeon Equivalent 4 GB | NVIDIA GeForce 2060 GTX or AMD Radeon Equivalent 6GB VRAM |
| DirectX | Version 12 | Version 12 |
| Storage | 8 GB available space | 8 GB available space |
Similar games
Video reviews
7:26 Dad on a Budget: Cepheus Protocol Review (Early Access)
Dad's Gaming Addiction
46:39 NEW Open World Zombie Apocalypse RTS Base Building Survival Strategy | Cepheus Protocol UPDATES
Raptor
9:58 Cepheus Protocol - Beginners Guide
GilBroz Gaming
Reviews are made and published by independent YouTube channels; they load only on click.
About this game — FAQ
Does Cepheus Protocol have co-op?
Yes, Cepheus Protocol supports online co-op.
Does Cepheus Protocol have multiplayer?
Yes, Cepheus Protocol has multiplayer.
Can Cepheus Protocol be played single-player?
Yes, besides multiplayer modes, Cepheus Protocol can also be played solo (single-player).
What languages does Cepheus Protocol support?
Cepheus Protocol is available in: English, Simplified Chinese, Korean, German, Japanese, Russian, Spanish - Spain, Portuguese - Portugal and 1 more.
Can Cepheus Protocol be played co-op via Remote Play Together?
Yes — Steam Remote Play Together lets you invite friends to play local modes online without them owning the game.
Does Cepheus Protocol use Steam Cloud saves?
Yes, Cepheus Protocol uses Steam Cloud, so your saves sync across devices.
FAQ
Where is the cheapest place to buy a Cepheus Protocol key?
The cheapest Cepheus Protocol key is currently sold by K4G for €13.90. That is the best of 6 offers we compare; prices are refreshed regularly. The lowest price we have ever recorded for this game: €7.29.
How much does Cepheus Protocol cost?
Cepheus Protocol currently costs from €13.90 — the cheapest offer across the stores we track. For comparison, the game costs €16.39 on Steam, so buying a key saves you about 15%.
Is K4G an official store or a keyshop?
K4G is a keyshop (marketplace) where independent sellers list keys, so prices are often lower than in official stores. Every offer on ulov.gg is clearly labeled with its store type.
Are keys from these stores legal?
Buying is legal — keys come from the grey market, so a small deactivation risk exists. So before paying, check the seller's buyer protection.
Which key region should I pick?
Global activates everywhere. Regional keys (Europe, North America, RU-CIS) only work on accounts from that region — use the Region filter to match your account.
What is an activation platform?
The service where the key activates — Steam, GOG, Epic or the publisher's platform. A key for one platform won't work on another, hence the separate filter.
What's the difference between editions?
Standard is the base game; Deluxe usually adds an expansion or bonus content. The edition filter shows exactly that variant, with no mixed prices.