Main Sequence enters Steam Early Access on November 12, 2026, publisher Mythwright announced on October 2, and it has the two things Brave New Wonders left out. That one was a solo factory game with no conveyor belts. This one is a first-person factory builder in space, with belts, and with co-op where every player captains their own ship.
It is PC only, through Steam, and there is no price yet; solo developer Kaiden Ho says the price and launch time will follow. Steam lists online and LAN co-op. There is no player cap in the release, on the store page or in Ho’s posts, and dedicated servers are not mentioned anywhere. A demo is on Steam now.
The co-op is still settling in. Multiplayer was an experimental mode in the playtest that ran from September 17 to 25. In the playtest announcement, Ho wrote that improving its “performance and stability will be an ongoing focus” before Early Access. An ongoing focus, he says. That is an honest line, and it is the one our server will hold him to before Main Sequence gets a Friday night.
How a Main Sequence factory grows from one mining ship
You start with one mining ship in an asteroid belt, scanning for good rock to mine and refine on board. Then you build a space station. The factory floor inside it is where the game lives: machines, conveyor belts and production lines, all placed by hand in first person. Ships and stations are built module by module, inside and out, and you can save a design and share it with friends. Later the same logic stretches between stations, with automated supply routes and a fleet that keeps everything stocked.
Co-op lets a group split that work. The store page pictures one player on logistics, one on defense and one out exploring, though you can also all chase the same job. Defense is a real job here: your mining wakes up an ancient alien defense network, and the fleet that hauls your ore also has to fight it. Groups who only want the factory have a peaceful mode, which Ho says is already in the demo.
Ho has built the game alone in Ottawa since 2023. The demo arrived on May 28 with the news that Mythwright, the publisher of Thronefall and Going Medieval, had signed it. Less than two weeks later, Ho reported more than 100,000 wishlists. That is a lot of attention for a one-person studio, and a lot of game. Satisfactory proved a first-person factory can hold a group, and Space Engineers proved people will build ships block by block. Main Sequence wants both in one asteroid belt.
Try the demo for the factory floor on your own. Then wait for the launch details Ho has promised, and a player cap, before it goes on the Friday poll.
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