Citadel — cheap CD keys, compare prices
Is it worth buying?
- The price is at or near its all-time low — a good time to buy.
Estimate based on public reviews (Metacritic/Steam) and price history — the final call is yours.
About the game
Citadel is a cooperative indie survival game featuring roguelike elements, drawing its inspiration from the film Cube. It was developed by Magisterion and 3Dever, published by Magisterion, and released in 2016.
Best price today
€11.01
all-time low: keyshop €11.01 near low
The cheapest Citadel key right now costs €11.01 at Kinguin — the best of 4 compared offers. The lowest price we have recorded for this game: €11.01.
The average low over the past 4 months was €11.28.
Prices as of
GameSeal Marketplace
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Listed seller price shown — payment fees may vary by method.
Citadel prices by store 4
| Store | Type | Price |
|---|---|---|
| Kinguin | Marketplace | €11.01 |
| GameSeal | Marketplace | €11.38 |
| G2A | Marketplace | €14.44 |
| K4G | Marketplace | €18.60 |
Lowest — keyshops
€11.01
Aug 2026
Price history
last 88 daysMonthly price lows
| Month | Lowest official | Lowest keyshop |
|---|---|---|
| Oct 2026 | — | €11.01 |
| Sept 2026 | — | €11.01 |
| Aug 2026 | — | €11.01 |
| Jul 2026 | — | €12.08 |
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: Kinguin, GameSeal, G2A, K4G
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All-time low so far: €11.01
System requirements
| Minimum | Recommended | |
|---|---|---|
| OS | Windows 7, 8, 8.1, 10 | Windows 7, 8, 8.1, 10 |
| Processor | Intel i3 Dual-Core with Hyper-Threading (required) | Intel i3 Dual-Core with Hyper-Threading (required) |
| Memory | 2 GB RAM | 4 GB RAM |
| Graphics | nVidia GeForce GTX 275 series or higher | nVidia GeForce GTX 275 series or higher |
| DirectX | Version 9.0 | Version 9.0 |
| Storage | 200 MB available space | 200 MB available space |
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About this game — FAQ
Does Citadel have co-op?
Yes, Citadel has a co-op mode.
Does Citadel have multiplayer?
Yes, Citadel has multiplayer.
Does Citadel support a controller/gamepad?
Yes, Citadel has full controller support.
What languages does Citadel support?
Citadel is available in: English.
FAQ
Where is the cheapest place to buy a Citadel key?
The cheapest Citadel key is currently sold by Kinguin for €11.01. That is the best of 4 offers we compare; prices are refreshed regularly. The lowest price we have ever recorded for this game: €11.01.
How much does Citadel cost?
Citadel currently costs from €11.01 — the cheapest offer across the stores we track.
Is Kinguin an official store or a keyshop?
Kinguin 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.