This product is a brand new and unused Main Assembly CD Key for Steam.

Immediately after payment, you will be sent a unique and unused CD Key which can be activated on Steam. You can collect this activation code from our Autokey page.  Simply enter your code into the Steam client (available free from steampowered.com). This will then grant you to a full digital download of the game.

How does our website work?

CJS CD Keys sell brand new CD Keys either taken directly from brand new sealed copies of the game, or sourced directly from world-leading game publishers. We source our keys in bulk directly from leading distributors and publishers, which reduces shipping costs.  This enables us to offer instant online delivery, at extremely competitive pricing.

After you receive your key, you can activate the game on the Steam client (available free from steampowered.com). After you activate the game with the Steam software, you can download the game immediately and instantly.

Benefits of buying from CJS CD Keys:

Instant Delivery

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NO shield fees - we offer a money-back guarantee within the price!

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Region Free

This product key we are selling is sourced directly from the publisher, or an official distributor of the game publisher. The key is completely region free and includes all languages. Region free means that you can activate the product code from anywhere in the world.

About Main Assembly:

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!