Opus Magnum
All offers (20)
Compare the platform, region and delivery before you buy.
Standard Edition 18 offers · EU & Global
Opus Magnum PC Steam CD KeyActivation keySteamGlobalLowest price€8.80+ payment feeView deal
Opus Magnum (Global) (PC / Mac / Linux) - Steam - Digital KeyActivation keySteamGlobal€8.94no Plus, no ProtectView deal
Opus Magnum EN/DE/FR/JA/RU/ZH GlobalActivation keySteamGlobal€9.03+ service feeView deal
Opus Magnum Steam Key GLOBALActivation keySteamGlobal€9.14+ fee possibleView deal
Opus Magnum (PC) Steam Key - EUActivation keySteamEurope€9.52+ service feeView deal- Opus Magnum (PC) Steam Key - GLOBALActivation keySteamGlobal€9.52+ service feeView deal
Opus Magnum Steam Key: GlobalActivation keySteamGlobal€10.89View deal- Opus Magnum Steam Key: Europe & UKActivation keySteamEurope€11.03View deal
Official store Steam · price for Germany
Steam store pageDirect purchaseSteamGermany€14.25No feeView on Steam
Other regions 2 offers
Sold for Latin America, North America, Asia, the Middle East, Russia or an unspecified region. These keys usually cannot be activated from Germany.
You buy directly from the store. "+ service fee" or "+ payment fee" means the store adds a fee at checkout; you see the final price there before you pay. We may earn a commission when you buy through our links.
Best price over the last 32 days
- Lowest €6.332 Nov 2026
- Highest €12.9018 Oct 2026
- Today €8.80
The cheapest EU or Global key per day across all compared stores; the dashed line is the Steam price.
Trailer & screenshots
Buy Opus Magnum key: current price comparison
Where is the Opus Magnum key cheapest?
The cheapest Opus Magnum key that activates in the EU currently costs €8.80 at Kinguin. Keyfinder compares 20 offers from 7 shops for this price. That is 38% less than the Steam price of €14.25. Prices are refreshed hourly; region, edition and any checkout fees are shown on each offer.
What was the lowest Opus Magnum key price in the last 32 days?
€6.33 on 2 Nov 2026, for the standard edition that activates in the EU. The highest daily low in that time was €12.90 on 18 Oct 2026; today the cheapest key costs €8.80.
Which Opus Magnum keys activate in the EU?
18 offers are marked EU or Global and activate in Germany and the rest of the EU. Keys for other regions are listed separately. The keys on offer are for Steam.
How do I activate the Opus Magnum key?
The cheapest key activates on Steam. You redeem it there with the code the shop sends you after you pay.
Is it safe to buy a Opus Magnum key from Kinguin?
Before you pay, check three things on the offer: the region (EU or Global for Germany), the edition and any fee added at checkout. Keyfinder shows all three on every offer. Our Kinguin check covers who runs the shop, its fees and its regions.
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About Opus Magnum
Opus Magnum is the latest open-ended puzzle game from Zachtronics, the creators of SpaceChem, Infinifactory, and SHENZHEN I/O. Design and build machines that assemble potions, poisons, and more using the alchemical engineer’s most advanced tool: the transmutation engine!
- Developer
- Zachtronics
- Publisher
- Zachtronics
- Release date
- 7 Dec 2017
- Steam
- View on Steam