Main Assembly

Main Assembly

Bad Yolk Games · 2021 · Sandbox, Building, Simulation, Online Co-Op, Programming

PC
Very Positive84% · 996
Best price 56 Good deal
$0.77-83%
lowest tracked $0.56
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Screenshots

About Main Assembly

You’re the designer, engineer and architect if you can imagine it you can create it! Construct robots of any shape or size from eight-legged spider bots to eerie UFO contraptions. Engineer each and every appendage with powerful visual programming letting you dictate the bots every move. When you’ve completed your masterpiece, open the world builder and craft the ultimate obstacle course to push your bot to its limit.

Alone or with fellow inventors, envision your design then make it a reality.

Create a world in which your bots will be challenged. Craft tracks for racing or complex obstacle courses that tease out all those lovely design flaws you didn’t know you had.

Show off your designer skills first-hand with up to three friends. Build worlds together to challenge each other's bots in different obstacles courses and tracks. Or smash each other's creations into metallic pulp (more coming soon).

No friends? No problems. We’ve created a single-player mode with over 100 challenges to test your inventions.

Don’t panic, we don’t expect you to code in C# (we’re doing that). In fact, it’s entirely optional, but if you’re up to the challenge we’ve designed a powerful visual programming tool for you to enhance your creations.

Add (or take) from the thousands of already created bots and worlds hand-crafted by our dedicated fans from all over the globe.

If you want to test the limits of your construction, then drive it off a cliff.

What Steam players say

Recent verbatim reviews from Steam — separate from playze.io community reviews below.

Not recommended Jul 6, 2026
Abandoned
1 found this helpful
Recommended Jul 26, 2026
its very easy to use and so much fun to play with friends
Recommended Jul 20, 2026
This game is one of a kind. I enjoy making all kinds of flying machines and designing flight controls. There is no other game where I can imagine an idea, make it into a concrete zany whirlibird of some sort, design controllers and nav systems for it, and then have my creations navigate and fly themselves, or have their own automatic dogfights in a real physics-based robot free for all. The combining of programmable control systems, physics modelling, and damage models is really incredible. I know this game hasn't received updates - but in my mind its really amazing and complete as it is - the content comes from your own mind - the devs already gave us the physical design tools, a solid programming interface with real math abilities, a damage model, and interaction with air, water, ground, and space - to really imagine and build and control most anything. The elegant programming interface and integration in particular is really rare for a game like this - and without being able to have my creations come to life with these real behaviors - the game wouldn't have nearly the richness it has. I do enjoy playing games in this genre - namely Scrap Mechanic, Trail Makers, AviAssembly, Sp…
Recommended Jul 15, 2026
this game is realy nice becus its like trailmakers but you dont have the restrictions of having to use glitches to make difrent formes and even then you are kind of limited but this game just throws everything like that out of the window and realy lets you do anything your creativity can imagine
Recommended Jul 6, 2026
big good
Recommended Jun 29, 2026
GOOD :)

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