Opus Magnum
Released Dec 2017
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!
97% positive · 7,159 reviews
Not yet
Released, but still in active development
Medium confidence
Active Development
Not yet
Released, but still in active development
Medium confidence
Active Development
Where to buy
Steam $19.99
Can't confirm — worth a look
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Evaluation
Opus Magnum launched on December 7, 2017. After years of dormancy, Zachtronics returned to the game in 2026 with a significant paid DLC — De Re Metallica — announced on February 19, 2026 and released on March 17, 2026, adding a new story campaign, new puzzle mechanics, and new glyphs. Following that release, the developer continued to ship updates at a steady pace: new journal issues (including the final issue of Volume CVIII, Issue XII, added June 16, 2026), quality-of-life improvements, a Korean translation for the DLC, and bug fixes — with the most recent update on July 28, 2026. The developer noted in the June 16 post that Volume CVIII Issue XII is "the final issue of the Journal of Alchemical Engineering, at least for now," which signals a pause on journal content but stops short of declaring development complete. No future content has been explicitly announced, but the developer remains actively engaged with the game and has not stated that development has concluded.
Evidence
De Re Metallica DLC launched, adding a new story campaign, new glyphs, new puzzle mechanics, and three new journal issues. Developer declared 'Opus Magnum is back!'
Opus Magnum: De Re Metallica DLC released on March 17, 2026
Content
1 of 1 released · no outstanding content
Media
Details
Developer
Publisher
Zachtronics
Achievements
6
Platform
Windows, macOS, Linux
Controller
—
Steam Deck
Playable
Players
Single-player
About this game
“It is not an exaggeration to say that without alchemical engineering, civilization would not exist.”
Hailed as the most promising alchemist of his generation, Anataeus Vaya has just accepted a position as Head Alchemist of House Van Tassen, the oldest and richest of the city’s ancient Houses. But dangers lurk behind the family’s opulent facade, and alchemy alone may not solve every problem.
Opus Magnum is the latest open-ended puzzle game from Zachtronics, the creators of SpaceChem, Infinifactory, TIS-100, and SHENZHEN I/O. Master the intricate, physical machinery of the transmutation engine— the alchemical engineer’s most advanced tool— and use it to create vital remedies, precious gemstones, deadly weapons, and more.
Design Machines - Design and build machines that carry out alchemical processes using a variety of components including programmable arms, customizable tracks, and more esoteric devices like Van Berlo’s wheel and the Glyph of Animismus.
Open-Ended Puzzles - Compete against your friends and the world to build the simplest, fastest, and most compact solutions to the game’s challenges. Export animated GIFs of your elegant designs to show them off.
Steam Workshop - Make and share your own puzzles with full Steam Workshop integration and an easy-to-use puzzle editor. Play the top user-submitted puzzles in the prestigious Journal of Alchemical Engineering, curated by Zachtronics!
Rich Story - Intrigues and dark plots swirl around the city’s ancient Houses. Alchemists, who hold the power to create almost anything known to science, are highly sought— and highly dangerous.
Solitaire Minigame - Alchemical engineering takes focus and concentration. Take a break with Sigmar’s Garden, an original alchemy-based solitaire game. Every game is winnable, but not every game will be won…
Hailed as the most promising alchemist of his generation, Anataeus Vaya has just accepted a position as Head Alchemist of House Van Tassen, the oldest and richest of the city’s ancient Houses. But dangers lurk behind the family’s opulent facade, and alchemy alone may not solve every problem.
Opus Magnum is the latest open-ended puzzle game from Zachtronics, the creators of SpaceChem, Infinifactory, TIS-100, and SHENZHEN I/O. Master the intricate, physical machinery of the transmutation engine— the alchemical engineer’s most advanced tool— and use it to create vital remedies, precious gemstones, deadly weapons, and more.
Design Machines - Design and build machines that carry out alchemical processes using a variety of components including programmable arms, customizable tracks, and more esoteric devices like Van Berlo’s wheel and the Glyph of Animismus.
Open-Ended Puzzles - Compete against your friends and the world to build the simplest, fastest, and most compact solutions to the game’s challenges. Export animated GIFs of your elegant designs to show them off.
Steam Workshop - Make and share your own puzzles with full Steam Workshop integration and an easy-to-use puzzle editor. Play the top user-submitted puzzles in the prestigious Journal of Alchemical Engineering, curated by Zachtronics!
Rich Story - Intrigues and dark plots swirl around the city’s ancient Houses. Alchemists, who hold the power to create almost anything known to science, are highly sought— and highly dangerous.
Solitaire Minigame - Alchemical engineering takes focus and concentration. Take a break with Sigmar’s Garden, an original alchemy-based solitaire game. Every game is winnable, but not every game will be won…
Are these done yet?
Last evaluated Aug 19, 2026
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