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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!

OfficialDec 7, 2017 · ZachtronicsIndieSimulationFamily SharingIncludes level editorSingle-playerWindows · Mac · Linux

Current best

$19.99

at GOG · Jul 9

All-time low

$9.99

Jul 5, 2026

Stores tracked

2

sources indexed

Review signal

97%

7,073 reviews

Opus Magnum cover

Current best · GOG

$19.99

Observed Jul 9

View best listing

Observed low target

$9.99 · based on the previous indexed low

KeyDwarf only tracks observations — checkout happens on the store.

Tracked Stores

Best indexed price $19.99 at GOG.

2/2
G

GOG

BestOfficialIn stock

Opus Magnum · Region US · Jul 9

$19.99

View listing
S

Steam

OfficialIn stock

Opus Magnum · Region US · Jul 11

$19.99

View listing
How trust is scored: KeyDwarf combines source type, known retailer posture, marketplace risk, activation-region warnings, and source transparency. Checkout and support still happen with the external seller.

Price History

3 observations
Low $9.99
Best observed priceAll-time low

All-time low

$9.99

Jul 5, 2026 · Steam

12-week avg

$16.66

3 recent observations

Current vs low

+100%

Current $19.99

Recommendation

Watch for drop

consider setting an alert

Lowest indexed daily price per currency. KeyDwarf tracks listings and does not sell keys.

Media

12 indexed

Common Questions

Where is Opus Magnum cheapest right now?

Opus Magnum is currently indexed at $19.99 from GOG. Publisher, direct storefront, or authorized retail source. Check the linked store's current terms before acting.

What is the historical low for Opus Magnum?

The indexed low for Opus Magnum is $9.99 from Steam, observed Jul 5, 2026. The current indexed price is 100% above that low, so KeyDwarf labels it "Watch for drop".

Is the top source safe?

GOG is labeled "Official store" in the index. KeyDwarf tracks the listing and source risk, but checkout and support stay with the external store.

What is the review signal?

Opus Magnum has a best indexed review signal of 97%.

Can KeyDwarf notify me about a lower price?

Use the alert target control on this page to save a watch target after sign-in.