Opus Magnum

Opus Magnum is an open-ended puzzle game in which you design machines to perform alchemical processes. You play Anataeus Vaya, a celebrated young alchemist who takes a position as Head Alchemist of House Van Tassen, the oldest and richest of the city’s ancient Houses. Dangers lie behind the family’s opulent facade, and alchemy may not be enough to solve every problem.

Design alchemical machines

You operate the transmutation engine, an advanced tool for alchemical engineering, and build machines to create remedies, gemstones, weapons and other products. Components include programmable arms, customizable tracks, Van Berlo’s wheel and the Glyph of Animismus.

Solve and compare puzzles

Puzzles have open-ended solutions. You can compare your designs with friends and players around the world, aiming for solutions that are simplest, fastest or most compact, and export animated GIFs of your machines.

Create and share puzzles

An editor lets you make your own puzzles and share them through Steam Workshop. You can also play user-submitted puzzles featured in the Journal of Alchemical Engineering, curated by Zachtronics.

Sigmar’s Garden

The game includes Sigmar’s Garden, an original alchemy-based solitaire game. Every game is winnable, though not every game will be won.