Main — Assembly Free Download

: Creations react to aerodynamics and can be smashed into "metallic pulp" during collisions or Bot Brawls.

: A Free Demo is available on Steam, allowing you to try the core building and programming mechanics before purchasing. Main Assembly Free Download

: Pirated versions typically lack multiplayer support and access to the Steam Workshop , which are core parts of the experience. Save 80% on Main Assembly on Steam : Creations react to aerodynamics and can be

: Use free-form tools to extrude and shape a robot’s chassis into any form, from spider-bots to planes. Save 80% on Main Assembly on Steam :

: The game frequently goes on sale. It is currently available for $19.99 $3.99 (80% off) on Steam until May 4, 2026.

is highly regarded for its deep engineering sandbox, offering features that keep players coming back:

Be wary of sites offering the "full version" for free outside of official platforms like Steam. These downloads often include: