Main Assembly
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About Main Assembly
Main Assembly is a building game where you design robots, program their movements and create worlds to test them. You can build alone or with up to three friends, then race your bots, tackle obstacle courses or drive your creations off a cliff.
Build and program robots
Construct bots in any shape or size, from eight-legged spider bots to UFO-like contraptions. A visual programming tool lets you control the movement of every appendage; coding in C# is optional.
Create worlds and challenges
Use the world builder to make tracks for racing and obstacle courses that test your bots and expose flaws in their designs. In multiplayer, up to three friends can build worlds together and challenge one another’s bots on courses and tracks. You can also smash each other’s creations.
Play solo or share creations
Single-player mode includes over 100 challenges for testing your inventions. You can also add to or take from thousands of bots and worlds made by players around the world.
Frequently asked questions
The best price for Main Assembly is $0.38 at Difmark. That is 98% less than on Steam, where it costs $19.99. 18 shops have an offer that activates in your country.
Some are. This page only shows offers that activate in your country; offers for other regions, or with no stated region, are left out. To see the offers for another country, change your country at the top of the page.
Every key we list activates on Steam. Redeem the key there and Main Assembly stays in your library for good.
Yes, with a small risk. Publishers create keys to sell in other shops, which is why a key can cost less than in the official store, and once you activate it the game is yours to keep, just like a store purchase. On average 1–2% of keys fail, so check the shop's buyer protection before you buy: the official store does not refund keys bought elsewhere.
The minimum requirements for Main Assembly are: Windows 7, GeForce GTX 750, Intel Core i3-4160, 4 GB RAM, 3 GB storage. It runs on Windows only. The recommended specs are in the System requirements section.
Yes. Main Assembly has multiplayer and a single-player mode. It supports online co-op and online PvP.
Mostly, yes. Valve rates Main Assembly as Playable on the Steam Deck: it runs, but may need some manual setup.
Buy Main Assembly 98% cheaper than on Steam.
Main Assembly is available for 98% less in shops such as Difmark, Kinguin, or Wyrel.
Steam lets publishers create keys to sell in other shops. Once you activate a key, the game is yours to keep, just like a store purchase.
Disclaimer: CD keys have an inherent 1–2% average failure rate. Check the shop terms for buyer protection info. Steam offers no buyer protection for keys bought in other shops and doesn't refund them.
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