Castella — 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
Castella is a tower-defense game with roguelike elements, tasking players with building a stronghold to hold off waves of monsters laying siege to a castle. Over the course of a run, players can research and improve a wide range of towers and structures, plus construct defensive walls that slow enemy advances while keeping the castle and its resources safe. The game is currently in Early Access, and Slime Potion Games both developed and published it, with a 2026 release.
Best price today
€1.15
all-time low: official €10.86 · keyshop €1.15 near low
On Steam: €14.49 — you save 92% here
The cheapest Castella key right now costs €1.15 at Kinguin — the best of 2 compared offers. The lowest price we have recorded for this game: €1.15. The cheapest official store price is €14.49 at Steam.
The average low over the past 4 months was €1.51.
Prices as of
Steam Official store
No offers match these filters — try widening them.
Listed seller price shown — payment fees may vary by method.
Castella prices by store 2
| Store | Type | Price |
|---|---|---|
| Kinguin | Marketplace | €1.15 |
| Steam | Official store | €14.49 |
Lowest — official stores
€10.86
Jul 2026
Lowest — keyshops
€1.15
Sept 2026
Price history
last 89 daysMonthly price lows
| Month | Lowest official | Lowest keyshop |
|---|---|---|
| Oct 2026 | €14.49 | €1.15 |
| Sept 2026 | €14.49 | €1.15 |
| Aug 2026 | €14.49 | €1.50 |
| Jul 2026 | €10.86 | €2.25 |
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, Steam
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All-time low so far: €1.15
System requirements
| Minimum | Recommended | |
|---|---|---|
| OS | Windows 7 x64 bits | Windows 10 / 11 x64 bits |
| Processor | 2.5 GHz | 3 GHz |
| Memory | 8 GB RAM | 8 GB RAM |
| Graphics | GTX 1050 | GTX 1060 (6 GB) |
| DirectX | Version 11 | Version 11 |
| Storage | 1 GB available space | 1 GB available space |
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About this game — FAQ
Can Castella be played single-player?
Yes, Castella is a single-player game.
What languages does Castella support?
Castella is available in: English, Spanish - Spain.
FAQ
Where is the cheapest place to buy a Castella key?
The cheapest Castella key is currently sold by Kinguin for €1.15. That is the best of 2 offers we compare; prices are refreshed regularly. The lowest price we have ever recorded for this game: €1.15.
How much does Castella cost?
Castella currently costs from €1.15 — the cheapest offer across the stores we track. For comparison, the game costs €14.49 on Steam, so buying a key saves you about 92%.
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.