Zen Aquarium — cheap CD keys, compare prices
Is it worth buying?
- Reviews are excellent. (Steam 94%)
- The price is well above its low (was €0.39) — 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
Zen Aquarium is a relaxing aquarium simulator with no goals or pressure — players simply watch fish drift calmly through a tank that shifts and evolves on its own. Calm visuals paired with ambient ASMR sound design bring the tank to life without any setup required. Astro Cat both developed and published the game in 2025.
Best price today
€1.88
all-time low: official €2.49 · keyshop €0.39 (+382%)
On Steam: €4.99 — you save 62% here
The cheapest Zen Aquarium key right now costs €1.88 at Kinguin — the best of 2 compared offers. The lowest price we have recorded for this game: €0.39. The cheapest official store price is €4.99 at Steam.
The average low over the past 4 months was €1.21.
Prices as of
Steam Official store
No offers match these filters — try widening them.
Listed seller price shown — payment fees may vary by method.
There are also offers of another kind (Gift) — show (1)
These are not ordinary keys. A gift is usually region-locked and arrives through someone else's account — if the region does not match, the game will not activate. An account means you get someone else's login: the game never becomes yours, and it breaks Steam's rules. A DLC or a bundle is not the base game. That is why none of them count towards the price at the top of the page.
Zen Aquarium prices by store 2
| Store | Type | Price |
|---|---|---|
| Kinguin | Marketplace | €1.88 |
| Steam | Official store | €4.99 |
Lowest — official stores
€4.99
Jul 2026
Lowest — keyshops
€0.39
Aug 2026
Price history
last 89 daysMonthly price lows
| Month | Lowest official | Lowest keyshop |
|---|---|---|
| Oct 2026 | €4.99 | €1.88 |
| Sept 2026 | €4.99 | €1.88 |
| Aug 2026 | €4.99 | €0.39 |
| Jul 2026 | €2.49 | €0.68 |
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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Confirm in our Telegram bot — no account, no spam.
All-time low so far: €0.39
System requirements
| Minimum | Recommended | |
|---|---|---|
| OS | Windows 10 (64-bit) | Windows 10 (64-bit) |
| Processor | Intel Core i3-6100 or AMD Ryzen 3 1200 | Intel Core i5-8400 or AMD Ryzen 5 2600 |
| Memory | 4 GB RAM | 8 GB RAM |
| Graphics | NVIDIA GeForce GTX 680 or AMD Radeon HD 7970 | NVIDIA GeForce GTX 1650 or AMD Radeon RX 570 (4GB VRAM) |
| Storage | 1 GB available space | 1 GB available space |
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About this game — FAQ
Can Zen Aquarium be played single-player?
Yes, Zen Aquarium is a single-player game.
What languages does Zen Aquarium support?
Zen Aquarium is available in: English, French, German, Japanese, Korean, Polish, Portuguese - Brazil, Portuguese - Portugal and 4 more.
FAQ
Where is the cheapest place to buy a Zen Aquarium key?
The cheapest Zen Aquarium key is currently sold by Kinguin for €1.88. That is the best of 2 offers we compare; prices are refreshed regularly. The lowest price we have ever recorded for this game: €0.39.
How much does Zen Aquarium cost?
Zen Aquarium currently costs from €1.88 — the cheapest offer across the stores we track. For comparison, the game costs €4.99 on Steam, so buying a key saves you about 62%.
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.