Opus Magnum is a puzzle game designed for Mac users, where players take on the role of an alchemical engineer. The game revolves around mastering the transmutation engine, a complex machinery used to create a variety of items such as remedies, gemstones, and weapons. Players can design and build their own machines to carry out intricate alchemical processes, making the gameplay both challenging and rewarding.

The game features open-ended puzzles that encourage competition among friends and the global community. Players can strive to create the simplest and most efficient solutions, with the ability to export animated GIFs of their creations. Additionally, Opus Magnum includes full Steam Workshop integration, allowing users to create and share their own puzzles easily. For a change of pace, players can enjoy a solitaire minigame called Sigmar’s Garden, offering a delightful diversion from the main challenges.