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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.
What players say
Steam review score and the most-helpful voices, which may include critical ones. Score via Steam as of 2026-09-28 · quoted reviews as of 2026-10-16.
“Let me be straight. This game is not for everyone. The modeling process is very close to the real deal modeling programs like Solidworks. The programming interface is literally a giant block diagram that is used in every system control application. To solve some control…”
— a player, Steam review · 1,386 hrs played“First off, I love the game and its idea. I cant wait to see what the community comes up with. Second. I would love to see a "BATTLE BOTS ARENA!!!" with flamethrowers, buzzsaws, and flippers. If you could fight other robots, this would go from a 10+ hours game to a 100+ hour…”
— a player, Steam review · 19 hrs played“This is exactly my kind of game and I have hundreds of hours in basically every similar game, I want to love this, but it has enormous issues: - In multiplayer this game crashes for at least one player every 1-2 minutes, usually when doing fairly normal things like moving a…”
— a player, Steam review · 12 hrs playedPlayer activity
Monthly average concurrent players, self-collected from the Steam API since Aug 2026.
Achievement stats
Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-10-20.
Price tracking
US-region pricing (USD), sampled twice daily by our own tracker since 2026-07-11. Steam prices vary by region — always confirm your local price on Steam.
Regional prices at last sample, in local currency — Steam sets each region's price independently.
Cheapest → most expensive, converted to USD at ECB reference rates (2026-10-20). Relative comparison only.
Latest official news
Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.
Main Assembly 1.1 Patch - now live for Beta testing!
Hello inventors! We've been working hard to address a lot of feedback and are making the new build available to the community, addressing issues listed a little further down. Please share any feedback
Main Assembly 1.0 is now available!
Inventors, creative minds of the future! Main Assembly, has today left Steam Early Access - and has officially launched! Hooray! https://i.imgur.com/kCJ7XdI.png Featuring a comprehensive array of free
Main Assembly -- Dev Log #38 Launch, 1.0 & Space!
Hey folks! *waves at the screen* https://i.imgur.com/DjgIJJj.png We hope everyone had a good end to the year -despite the current situation - and that all of you got off to a solid, creative start in
Main Assembly Launches January 26th w/ Space Update!
Inventors of the future, past and present, Main Assembly will be unleashed into the wild of a plethora of creative minds, as the game launches on January 26th 2021! Version 1.0 will be live on release
Main Assembly -- Dev Log #37 Space, Spaceships. Roadmap, Festive Competition!!
Hello! Hello! Hello! We hope everyone is getting into the Holiday spirit! As much as we love working on Main Assembly, we do need our vacation; we are looking forward to ending this week in a smashing
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Screenshots
Official Steam store screenshots — click any shot to enlarge.
Facts & details
From the Steam store record, snapshot 2026-05-13.
| Genres | Simulation |
| Player tags | 3D · Online Co-Op · Co-op · Singleplayer · Sandbox · Building · Simulation · Programming · Robots · Physics · Artificial Intelligence · Science (SteamSpy community voting) |
| Features | Single-player · Multi-player · PvP · Online PvP · Co-op · Online Co-op · Steam Achievements · Steam Workshop |
| Languages | English * , French, Italian, German, Spanish - Spain, Russian, Simplified Chinese, Traditional Chinese, Portuguese - Brazil, Japanese * |
| Achievements | 21 |
Minimum system requirements (PC)
Minimum: 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