Main Assembly — Steam capsule
Steam capsule · 460×2152.14 : 1

Main Assembly Free Download

by Team17

Windows · Jan 25, 2021

Download Now Data checked on Steam: Oct 20, 2026
Fit check

Is Main Assembly worth it for you?

We tell you who should skip it, too.

Play it if you…

Good fit
  • Robot-building fans who want to shape machines and control their behavior
  • Creative players who prefer making tracks and obstacle courses over following fixed levels
  • Small groups interested in building and testing creations together

Skip it if you…

Saves you a refund
  • Players seeking a tightly scripted campaign rather than open-ended construction and testing
  • Users who want to avoid visual programming and repeated experimentation with robot designs
  • Solo players looking for a story-driven adventure or role-playing game
  • Players who prefer games without player-created worlds and shared creations

Drafted from Steam store data with AI and reviewed by an editor · How we write fit checks · Report an error

Our take on Main Assembly

The bounce point arrives when robot construction meets behavior design. Building a machine is only part of the process; players who do not want to configure movement through visual programming may stall before their creations can handle the game's courses and challenges.

What is Main Assembly?

Build robots in varied shapes, from spider-like machines to UFO-style creations, then control their movements with a visual programming system.

A world builder lets players make racing tracks and obstacle courses that test each machine. The game includes a single-player mode with over 100 challenges, plus multiplayer construction and competition for up to three friends. Players can work together on worlds, challenge one another's robots, or collide with opposing creations. Existing robots and worlds made by other players can also be added. C# programming is optional, while the visual programming tool provides another way to customize robot behavior.

How Main Assembly plays

01Visual robot programming
A visual tool controls how each constructed robot moves, with C# coding presented as optional.
02Custom world building
Players can create racing tracks and obstacle courses for testing their machines.
03Single-player challenges
The solo mode contains over 100 challenges for testing robot designs.
04Four-player creation
A host can build worlds with up to three friends and use them for robot challenges.
05Community creations
Thousands of robots and worlds made by other players are available to add.

Main Assembly compared to similar games

Main Assembly combines robot construction, visual behavior programming, and player-built racing or obstacle environments. SpaceChem focuses on arranging factories that transform raw materials into chemical products, while Fun with Ragdolls: The Game centers on building worlds around ragdolls and hazards such as cannons, fans, mines, and lasers.

Main Assembly: platforms & release

Is Main Assembly worth it?

It is worth it if: robot-building fans who want to shape machines and control their behavior. Skip it if: players seeking a tightly scripted campaign rather than open-ended construction and testing.

Where can I download Main Assembly?

Use the Download Now button on this page: it opens Main Assembly's store page, where you can choose how to get it.

What platforms is Main Assembly on?

Windows only.

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