# Opus Magnum

Summer DB entity ID: 391060f4\-8d52\-40c8\-af4a\-48210bb61fc0

Steam App ID: 558990

“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…

## Game information

- Type: game

- Developer: Zachtronics

- Publisher: Zachtronics

- Release date: Dec 7, 2017

- Coming soon: false

- Free to play: false

- Parent Steam app: Not collected

- Genres: Indie, Simulation

- Categories: Single\-player, Steam Achievements, Steam Workshop, Steam Cloud, Steam Leaderboards, Includes level editor, Family Sharing

- Platforms: windows, mac, linux

- Website: Not collected

- Screenshots: https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/558990/ss\_e54f24ab7b2bebaee812be7e46e907ccc6323643\.1920x1080\.jpg?t=1774910584, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/558990/ss\_e395f88a023ad623f64a622d343eee17e1e6ea9d\.1920x1080\.jpg?t=1774910584, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/558990/ss\_0e35cab840c52b9d39b988d0b0c96b8fe9117264\.1920x1080\.jpg?t=1774910584, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/558990/ss\_92c30b0f0d8737cfe8c0b70364bbb3712e2bdd43\.1920x1080\.jpg?t=1774910584, https://shared\.akamai\.steamstatic\.com/store\_item\_assets/steam/apps/558990/ss\_b699747de6a3335040160f7fc4af3b5158981b43\.1920x1080\.jpg?t=1774910584

- Price: 1999 minor units USD; discount 0%

- Price country: US

## Observed metrics

- Current players: 169

- Steam review count: 7261

- Steam positive reviews: 7062

- Steam negative reviews: 199

- Steam positive percentage: 97.25933067070652%

- Summer DB rating: No native votes

Review filters: \{"language":"all","review\_type":"all","purchase\_type":"all","filter\_offtopic\_activity":0\}

## Player history

[Seven-day chart data as Markdown](/api/v1/entities/391060f4-8d52-40c8-af4a-48210bb61fc0/player-metrics?days=7&format=markdown) · [JSON](/api/v1/entities/391060f4-8d52-40c8-af4a-48210bb61fc0/player-metrics?days=7)

Chart values are hourly observed maxima. The sampled 24-hour peak and missing intervals carry explicit coverage; history before collection is unknown.

## Sources and freshness

- Catalog membership: store\_catalog

- Catalog observed: 2026\-09\-24T19:57:04\.362365\+00:00

- Details observed: 2026\-09\-22T16:46:27\.684284\+00:00

- Player count observed: 2026\-09\-22T16:46:28\.902138\+00:00

- Reviews observed: 2026\-09\-22T16:46:28\.816594\+00:00

Full provenance: \{"urls":\{"price":"https://store\.steampowered\.com/app/558990/","catalog":"https://api\.steampowered\.com/IStoreService/GetAppList/v1/","details":"https://store\.steampowered\.com/app/558990/","players":"https://api\.steampowered\.com/ISteamUserStats/GetNumberOfCurrentPlayers/v1/?appid=558990","reviews":"https://store\.steampowered\.com/appreviews/558990"\},"price":"2026\-09\-22T16:46:27\.684284\+00:00","source":"steam","catalog":"2026\-09\-24T19:57:04\.362365\+00:00","country":"US","details":"2026\-09\-22T16:46:27\.684284\+00:00","players":"2026\-09\-22T16:46:28\.902138\+00:00","reviews":"2026\-09\-22T16:46:28\.816594\+00:00","language":"en","editorial":null,"membership":"store\_catalog","observations":\{"price":"2f572cb1\-da68\-4103\-970e\-055165ce6e0d","catalog":"87dc518d\-7b8f\-4e7e\-af3d\-20df5bf298fc","details":"f6be32a9\-4b2a\-433b\-b374\-ada357f81a90","players":"3f650f48\-85c2\-4977\-84b0\-d55ec35b9eea","reviews":"5bbcd3ec\-92cf\-41a9\-ae8e\-8a7b9f132dfe"\},"reviewFilters":\{"language":"all","review\_type":"all","purchase\_type":"all","filter\_offtopic\_activity":0\}\}

Native rating methodology: \{"count":0,"average":null,"entityId":"391060f4\-8d52\-40c8\-af4a\-48210bb61fc0","revision":0,"observedAt":null,"methodology":"arithmetic\-v1","distribution":\[0,0,0,0,0,0,0,0,0,0\]\}

Steam reviews are not Summer DB votes. Missing data is not zero. Player counts are observations, not historical peaks. A supplemental record does not establish that a game was delisted.

[Steam store](https://store.steampowered.com/app/558990/) · [JSON](/api/v1/games/391060f4-8d52-40c8-af4a-48210bb61fc0)