Main Assembly

About

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.

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8
Based on
988 reviews
Country Compatibility:
Languages:
Developer:
Bad Yolk Games
Release date:
26 January 2021
Recent Steam reviews:
Not specified
All Steam reviews:
Very Positive (988)

Game features

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Description

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.

Recommended system requirements

minimum*

Requirement 1:
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

recommended*

Requirement 1:
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

User reviews

₦Ø₮ⱤɆⱠ₳ӾɆD
Not recommended | 03 Feb 2026
9.8h played

if a game is published by team17, you can bet itll be forgotten and abandoned shortly after release. this game is no different. abandoned for years, was hoping for a sign of life, but nope. abandoned.

Helpful: 20
dev.carpeso
Recommended | 06 Aug 2025
16.9h played

This is a good sandbox game, albeit very limited in terms of the events and in-world NPCs. But for the amount I got it, this was definitely a freaking steal! Play this if you want to flex your creativity and want to

Helpful: 4
tizzythecat50
Recommended | 05 Aug 2025
11.2h played

Absolutely amazing freaking game! I've had this game in my steam library for about 9 months just waiting until I could get a better computer to play it, I definitely would say the wait was worth it, and I regret not

Helpful: 4
masoon?
Recommended | 04 Dec 2025
30.4h played

great engineering game, more complex side though provides alot more freedom with what you can do. If your intrested in engineering, design, or anything related to this i highly suggest you consider getting this game.

Helpful: 3
AXE555
Not recommended | 18 Oct 2025
10.6h played

DEAD GAME!! Before buying please realise that this is a completely dead and abandoned game. I bought it in June 2025 when it was dead for at least 10 months already. There are no official servers and no further updates.

Helpful: 0
Scraplord7
Recommended | 08 Aug 2025
74.5h played

Was a very good game. But no one plays it anymore, and it has yet to be updated in over 4 years. Safe to say it has been abandoned.

Helpful: 4