Is Main Assembly co-op?

Yes, Main Assembly supports co-op.

Does Main Assembly have PvP?

Yes, Main Assembly has player-versus-player modes.

How many people play Main Assembly?

About 5 players were in-game when this page was built (2026-09-09).

Ready Up — what game do we play?Compare two Steam libraries →

Multiplayer games › Sandbox & building › Building & crafting

Is Main Assembly multiplayer or co-op?

Yes — co-op and PvP. Main Assembly is a building & crafting game released in 2021, 85% positive on Steam (1,314 reviews), with 5 playing right now. $19.99 on Steam.

Co-opPvPSingle-player tooSandbox & building · Building & crafting

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…

Steam tags: 3D, Online Co-Op, Co-op, Singleplayer, Sandbox, Building, Simulation, Programming

Do you and a friend both own Main Assembly?

Ready Up compares two Steam libraries and shows every multiplayer game you both have — including whether Main Assembly is one of them — then helps you pick tonight's game with a weighted roll or a bracket.

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Tired of Main Assembly? The Swap tab finds the closest unowned games of the same type that are newer or rated higher.

Quick answers

Is Main Assembly co-op?: Yes, Main Assembly supports co-op.
Does Main Assembly have PvP?: Yes, Main Assembly has player-versus-player modes.
How many people play Main Assembly?: About 5 players were in-game when this page was built (2026-09-09).

Ready Up is a free tool: enter two Steam usernames and it lists the multiplayer games you both own, runs a bracket to pick one, and suggests new co-op games that fit how you both play. Ratings, tags and player counts from Steam and SteamSpy; page updated 2026-09-09. Powered by Steam — not affiliated with or endorsed by Valve Corporation or Microsoft. How the data works · Legal & privacy · All types · Game Pass