Quantum Conundrum — cheap CD keys, compare prices
Is it worth buying?
- Reviews are solid. (Metacritic 77 · Steam 85%)
- 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
A first-person puzzle game where you use your uncle's invention to shift between dimensions and solve puzzles across a sprawling, zany mansion. The goal is to find and rescue the missing inventor by altering the world's properties.
Did you know?
Quantum Conundrum (2012) was designed by Kim Swift, co-creator of the original Portal, and published by Square Enix.
Best price today
€0.98
all-time low: official €0.98 · keyshop €1.05 near low
The cheapest Quantum Conundrum key right now costs €0.98 at Steam — the best of 12 compared offers. The lowest price we have recorded for this game: €0.98.
The average low over the past 5 months was €1.17.
↳ chosen by the region label on the key — not a guarantee
Prices as of
Steam best price Official store
GameSeal Marketplace
GameSeal Marketplace
K4G Marketplace
Driffle Marketplace
G2A Marketplace
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 · Add-on, not the full game) — show (2)
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.
Quantum Conundrum prices by store 8
| Store | Type | Price |
|---|---|---|
| Steam | Official store | €0.98 |
| GameSeal | Marketplace | €1.05 |
| K4G | Marketplace | €1.37 |
| Driffle | Marketplace | €1.45 |
| Instant Gaming | Marketplace | €1.49 |
| Gamivo | Marketplace | €1.51 |
| Loaded | Marketplace | €1.79 |
| G2A | Marketplace | €2.36 |
Lowest — official stores
€0.98
Aug 2026
Lowest — keyshops
€1.05
Oct 2026
Price history
last 89 daysMonthly price lows
| Month | Lowest official | Lowest keyshop |
|---|---|---|
| Oct 2026 | €0.98 | €1.05 |
| Sept 2026 | €8.99 | €1.27 |
| Aug 2026 | €0.98 | €1.18 |
| Jul 2026 | €8.99 | €1.22 |
| Jun 2026 | €8.99 | €1.39 |
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: Steam, GameSeal, K4G, Driffle, Instant Gaming, Gamivo, Loaded, G2A
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All-time low so far: €0.98
System requirements
| Minimum | Recommended | |
|---|---|---|
| OS | Windows 7 SP1 | Windows 7 SP1 |
| Processor | Intel Core 2 Duo 2.2 Ghz / AMD Athlon x2 64 3800+ | Intel Core 2 Duo 3 GHz E8400 |
| Memory | 2 GB RAM | 2 GB RAM |
| Graphics | GeForce 8800 GT 512 MB / ATI Radeon HD 2900 512 MB | nVidia GeForce 9500 GT / ATI Radeon HD 2900 |
Similar games
Video reviews
5:49 GameSpot Reviews - Quantum Conundrum
GameSpot
2:22 Quantum Conundrum: Video Preview
IGN
3:23 Quantum Conundrum Review - IGN Video Review
IGN
Reviews are made and published by independent YouTube channels; they load only on click.
About this game — FAQ
Can Quantum Conundrum be played single-player?
Yes, Quantum Conundrum is a single-player game.
Does Quantum Conundrum support a controller/gamepad?
Yes, Quantum Conundrum has full controller support.
What languages does Quantum Conundrum support?
Quantum Conundrum is available in: English, French, German, Italian, Spanish - Spain, Japanese.
Does Quantum Conundrum use Steam Cloud saves?
Yes, Quantum Conundrum uses Steam Cloud, so your saves sync across devices.
FAQ
Where is the cheapest place to buy a Quantum Conundrum key?
The cheapest Quantum Conundrum key is currently sold by Steam for €0.98. That is the best of 12 offers we compare; prices are refreshed regularly. The lowest price we have ever recorded for this game: €0.98.
How much does Quantum Conundrum cost?
Quantum Conundrum currently costs from €0.98 — the cheapest offer across the stores we track.
Is Steam an official store or a keyshop?
Steam is an official store — keys come directly from the publisher or an authorized distributor.
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.