Besiege 1.91 for macOS

Think of it as the garage workbench you had as a kid, except every lopsided contraption is a medieval war machine and the test run ends in glorious, physics-driven collapse.

Physics engine — the star of the show. Machines twist, break, and fly apart exactly the way their parts demand.

Campaign — a full single-player mode where you conquer levels by destroying mills, soldiers, fortresses, and villages.

Multiplayer — skirmish with friends in special arena battles, or tackle the campaign together.

Workshop — Steam Workshop support means a steady stream of user-created machines and parts.

Level editor — set spawn points, objectives, and the look of a level, then share it.

Mods — add new blocks, level objects, and logic that changes how the game behaves.

This is a tinkerer's game. If you enjoy the process of building something ridiculous and watching it fail, you will lose hours here. If you need structure, story, or a clear goal, the sandbox may feel aimless. The campaign gives you direction; the building gives you freedom. The player who loves both is the player this game was made for.

Dial camera shake down to 20%

Out of the box, Besiege plays fine—but a couple of tweaks make the building process feel less like fighting the interface.

• Camera shake — turn it down to about 20% under Options > Camera. The default rattles like a cart on cobblestone whenever something explodes, and in this game, things explode constantly.
• Block placement grid — enable the grid overlay in the builder if you haven't already. It saves you from eyeballing symmetry on a twenty-block catapult arm.
• Keybind for "undo" — the default Ctrl+Z works, but binding a spare mouse button to it lets you backtrack a bad brace placement without moving your left hand off the WASD keys during a test run.
• Simulation speed — the slider lives in the top bar during play. Slowing things to half-speed while you fine-tune a walking mechanism reveals exactly which joint buckles first.

small conveniences you'll kick yourself for missing

A handful of shortcuts sit just below the surface. Once you know them, the workflow tightens up considerably.

• Middle-click drag — rotates the camera around a point without switching tools. In tight builds, it's faster than orbiting with the right mouse button.
• Shift-click a block — copies the block and all its attached children. Duplicating a four-legged walker leg this way keeps your joint angles intact, which manual copy-paste rarely does.
• Holding Alt while placing — disables surface snapping temporarily. Useful when you need to float a brace just off a gear without the game deciding it belongs flush against the wheel.
• Parameter tuning on the fly — click a placed wheel or piston during simulation and you can adjust its speed or range from a small pop-up panel. No need to stop the machine, delete the part, and rebuild.

None of these are hidden in a manual. The tooltips mention them briefly, and most players scroll right past. If you grab a Besiege Mac torrent, just know that even the shiniest download won't tell you about that Alt key trick.

Version 1.91 mostly fills in the Mac side of things and adds a few quality-of-life touches.

• Mac support for The Broken Beyond expansion
• Zone 79 added
• New Fuel Pump block
• Block category buttons can be dragged and reordered

• macOS: not specified
• Architecture: Intel and Apple Silicon
• Interface languages: Russian, English, German, Simplified Chinese, Korean, Portuguese, French, Japanese