Opus Magnum

Open-ended automation puzzles with programmable arms and alchemical machines

Zachtronics · Released Dec 7, 2017

Reviews: Overwhelmingly Positive; 97% of 7,259
Recent reviews: Very Positive; 96% of 90 in 30 days
Playing now: 113; peak 24h 170
Steam Deck: Playable
Last update: 1 month ago; Jul 28, 2026

What is Opus Magnum?

A single-player, 2D puzzle game about alchemical engineering. Across open-ended challenges, you place programmable arms, tracks, and other devices, then sequence their actions to turn materials into remedies, gemstones, weapons, and other products. The story follows Anataeus Vaya, head alchemist for House Van Tassen, as danger emerges around the family.

For you if...

+you enjoy finding creative solutions to open-ended logic puzzles
+you like optimizing working machines for speed, cost, and size
+you want single-player automation with programmable moving parts

Not for you if...

−you prefer puzzles with one clearly intended solution
−you mainly want to clear levels without revisiting solutions
−you want a relaxed, low-complexity puzzle game

What players say

97% of 7,259 reviews are positive · 96% of 90 in the last 30 days

Players praise the flexible solutions, machine-building, and depth of optimization. The most common complaint is that larger designs become tedious to edit and debug due to limited copy-paste, grouping, breakpoint, and reverse-step tools. Some players also find the campaign repetitive when they focus only on completing each puzzle.

Screenshots and trailer

Opus Magnum system requirements

As published by the developer.

Minimum

OS: Windows Vista / 7 / 8 / 10
Processor: 2.0 GHz
Graphics: 1366 x 768
Memory: 4 GB RAM
Storage: 600 MB available space
DirectX: Version 11

PC version details

DRM, required accounts, controller support and Steam features.

DRM: None declared on Steam
Controller: Keyboard and mouse
Platforms: Windows, macOS, Linux
Achievements: 6
Steam features: Workshop, Cloud saves, Family Sharing

Steam Deck: Playable

Sometimes shows mouse, keyboard or non-Deck controller icons
All functionality is accessible with the default controller configuration
In-game text is legible on Steam Deck
Default graphics settings perform well on Steam Deck

Multiplayer and co-op

Single-player

Languages

Text only: English, French, German, Japanese, Russian, Simplified Chinese, Spanish - Latin America, Korean, Turkish, Ukrainian, Portuguese - Portugal, Czech, Polish.