Build robots with revolutionary free-form crafting tools and control them through powerful visual programming. Overcome solo challenges or play with your friends in multiplayer. Featuring advanced physics like aerodynamics and robot destruction!
All Reviews:
Very Positive (138) - 92% of the 138 user reviews for this game are positive.
Release Date:
Jun 11, 2020

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Early Access Game

Get instant access and start playing; get involved with this game as it develops.

Note: This Early Access game is not complete and may or may not change further. If you are not excited to play this game in its current state, then you should wait to see if the game progresses further in development. Learn more

What the developers have to say:

Why Early Access?

“We have brought Main Assembly to a point where we feel it is time to involve our community and let players explore the game. We think it is essential to engage with our audience and gather feedback to bring this project to its ultimate, final form!”

Approximately how long will this game be in Early Access?

“We're aiming for 1 year in Early Access.”

How is the full version planned to differ from the Early Access version?

“The final game will have a more refined and smoother crafting experience. Beyond that, we intend to add additional crafting tools and more parts to unleash even crazier creations, more challenge levels to overcome and sandbox levels to play around in.

For more information see our road-map (that will be updated periodically!)”

What is the current state of the Early Access version?

“There will be some rough edges, bugs, performance issues, and potentially some crashes while you experience:
  • Freeform frame/plate creation tool.
  • Several functional and cosmetic parts to use in robot creation.
  • Optional Visual programming tool for advanced control of your creations.
  • Destruction-system with robot-body deformation and damage.
  • Aerodynamics on robot bodies.
  • A selection of singleplayer challenges to master.
  • Set up your own goals in the open sandbox level.
  • Create and play with your friends in Multiplayer.

Will the game be priced differently during and after Early Access?

“Price may increase moderately when we release.”

How are you planning on involving the Community in your development process?

“By engaging directly with our community in any way we can, be it Steam forums, our official discord, twitter, Reddit. We want your thoughts and feedback because we are making this game for you!
We will provide our playerbase with regular work-in-progress beta-builds for the community to test all the latest crazy stuff, as well as more refined main-branch updates.”
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“Main Assembly is only really limited by your imagination.”
God Is A Geek

“It is a frictionlessly inventive playground.”
Rock Paper Shotgun

“Almost unlimited scope to build and play with robots, vehicles and much more, using unprecedented, free-form crafting tools”



Build amazing levels to test your creations. With 8 sets of blocks including racetracks, obstacles, railways and much more, let your creativity be the limit!

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About This Game

In Main Assembly if you can imagine it, you can create it! You’re the engineer to build, break, destroy and enjoy! Create robots without limitation, cars, planes, or giant animatronics- ANYTHING! Once you’ve built them? It’s time to pilot them through multiple sandbox areas or push them to breaking point in challenge mode.

Key Features:

- 3 large sandbox maps
- 7 types of challenge sets, 20 levels
- Progression with 115 stars to collect
- Up to 4 player multiplayer
- Free-form Crafting Tool
- Intuitive Visual Programming
- Advanced physics and aerodynamics
- Destruction system
- 57 Drone character cosmetics


With a powerful and limitless building tool at your fingertips you can progress from a building beginner to an amazing architect. Every plate, chassis and frame is completely customisable! Tinker alone or enlist friends for your next big project. Build something amazing? Share it in the Steam Workshop!


Like everything in Main Assembly, if you can imagine it, you can create it- including multiplayer fun! Whether you want to chase, race or shove your genius creations in their face, the choice is yours! In sandbox areas you are free to play the game your way. Remember, friends who play together, stay together!


Test your inventions by taking on challenge packs! With increasing difficulty push your creations to the limit by testing their speed, survival, and handling through a series of challenges. Can’t do it? Don’t go nuts and bolts, alter your robot, build a new one or download a creation from the workshop!


In a game where anything is possible- don’t be basic. Every aspect of your robot is customisable from the size, shape to the colour. Think it’s lacking a finishing touch? Stick some googley eyes on it! The robotic-chic doesn’t end there. As you navigate through the world of Main Assembly you take on the role of a spherical marvel AKA a drone, complete with a tool kit of cosmetics!


Now you have a beautiful robot, bring it to life! By using the nodes in the powerful visual programming interface, you can set up controls for your robot. After getting the hang of it, you can dig deep into it and use Sensors to make logic for different types of automation. Or, equip rockets for explosive game play!


Your robots will take damage if they crash, fall, or take a hammer to the face! Advanced destruction systems enable bending chassis and damage that affects robot behavior. But don’t worry, you can iterate to improve and re-spawn your robot to crash it even harder!

System Requirements

    • Requires a 64-bit processor and operating system
    • OS: WINDOWS® 7 (64-bit)
    • Processor: Intel® Core™ i3-4160 or AMD equivalent
    • Memory: 4 GB RAM
    • Graphics: NVIDIA® GeForce® GTX 750 or AMD equivalent
    • Storage: 3 GB available space
    • Requires a 64-bit processor and operating system
    • OS: WINDOWS® 7 (64-bit)
    • Processor: Intel® Core™ i5-4460 or AMD equivalent
    • Memory: 8 GB RAM
    • Graphics: NVIDIA® GeForce® GTX 970 or AMD equivalent
    • Storage: 3 GB available space

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