NOTICE: Activation key must be used on a valid Steam account. Requires an internet connection.
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.
About the 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.
CREATE 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!
COMPETE 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!
CHALLENGE 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!
CUSTOMIZE 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!
CONTROL 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!
CRASH 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!
Main Assembly uses the Unreal® Engine. Unreal® is a trademark or registered trademark of Epic Games, Inc. in the United States of America and elsewhere Unreal® Engine, Copyright 1998 – 2020, Epic Games, Inc. All rights reserved. (©)Bad Yolk Games AB 2020. Main Assembly™ is a trademark of Bad Yolk Games AB.
1. Register an account
Go to www.steampowered.com and click 'login' at the top right corner of the website. After that, press 'Join Steam' in the middle of your screen to create your account.
2. Download Steam
Click the green button that says 'Install Steam' at the top right corner of the website, install Steam and login with with the account you created in step 1.
3. Click 'Games' at the top of your screen and select 'Activate a product on Steam'
4. Open the confirmation e-mail you received from Startselect and copy the code into the 'Product Code' box.
5. Confirm the code and install the game
6. You can access your games by clicking 'Library' at the top of your screen.
7. After the download is completed, you can enjoy your game!
Now on Startselect!
Now available at Startselect: Main Assembly. At Startselect you can purchase your digital games and gift cards anywhere and anytime. All of our products are fully authorized and supported by the publisher or developer.
Do you want to purchase this product? Just pick one of the payment methods, check out and you will receive your digital code almost immediately in your mailbox. If you run into any problems or if you have a question, our support team is standing by. We want to give you the easiest shopping experience, so you can use your product straight away!
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