PCGame

Main Assembly

Physics-based robot-building sandbox with programmable machines and custom test courses

Bad Yolk Games · Published by Team17 · Released Jan 26, 2021

Simulation

Reviews
Very Positive
85% of 1,092
Recent reviews
Not enough recent
Players
1
daily peak, Oct 28, 2026
Steam Deck
Playable
Last update on Steam
5 years ago
Aug 11, 2021
Minimum PC
GTX 750
4 GB RAM · 3 GB disk
Full requirements

What is Main Assembly?

Main Assembly is a building sandbox where you shape robots and vehicles, then test them in single-player challenges or on tracks and obstacle courses you create. Visual programming is optional, and you can build worlds with up to three friends.

For you if...

  • +you enjoy engineering problems and designing automated control systems
  • +you like sharing custom robots and worlds with other players

Not for you if...

  • −you prefer simple block assembly to detailed modeling tools

What players say

85% of 1,092 reviews are positive

Players praise the flexibility of the vehicle builder and its programmable controls. Recent negative reviews mainly complain that the game appears abandoned.

Screenshots and trailer

Main Assembly screenshot 1

Main Assembly system requirements

Minimum: GTX 750, 4 GB RAM, 3 GB of disk space.

As published by the developer.

Can my PC run Main Assembly?

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Minimum

OS
WINDOWS® 7 (64-bit)
Processor
Intel® Core™ i3-4160 or AMD equivalent
Graphics
NVIDIA® GeForce® GTX 750 or AMD equivalent
Memory
4 GB RAM
Storage
3 GB available space

Recommended

OS
WINDOWS® 7 (64-bit)
Processor
Intel® Core™ i5-4460 or AMD equivalent
Graphics
NVIDIA® GeForce® GTX 970 or AMD equivalent
Memory
8 GB RAM
Storage
3 GB available space

Does Main Assembly have co-op or multiplayer?

Yes: co-op online; PvP online. It also has a single-player mode.

Does Main Assembly run on Steam Deck?

Playable Playable: it runs on Steam Deck with some adjustments.

  • Default controller config not fully functional
  • Sometimes shows mouse, keyboard or non-Deck controller icons
  • Some text entry requires manually opening the on-screen keyboard
  • In-game text is legible on Steam Deck
  • Default graphics settings perform well on Steam Deck
  • External controllers are not supported for the primary player

PC version details

DRM
None declared on Steam
Controller
Keyboard and mouse
Platforms
Windows
Achievements
21
Steam features
Workshop, Cloud saves, Family Sharing
Languages
Full audio: English. Text only: French, Italian, German, Spanish - Spain, Russian, Simplified Chinese, Traditional Chinese, Portuguese - Brazil, Japanese.

Does Main Assembly use AI-generated content?

No AI-generated content is disclosed on the game's Steam page.

Self-reported by the developer under Steam rules: it covers AI content that ships in the game, not tools used to make it. Steam page checked on Oct 27, 2026. How to filter AI games on Steam

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