“Early Access is the best way to realize the full potential of Main Sequence,” solo developer Kaiden Ho writes on the game’s Steam page, and on Thursday, November 12, 2026, it enters Steam Early Access. The first-person space factory builder from publisher Mythwright is PC only. It costs $24.99, €24.99 or £21.99, with 20% off for its first two weeks, and the store countdown puts the unlock at around 11 AM Eastern.
The best way, he says. For a one-person studio sitting on more than 200,000 wishlists, it is also the fastest way to learn what a crowd of players does to a factory. Ho plans to stay in Early Access for one to two years, and the store page says the price will be adjusted at 1.0.
Co-op is online, and each player is the captain of their own ship. The store page still gives no player cap, and nothing Ho has posted mentions dedicated servers. The netcode has moved on, though. When we covered the November 12 date in October, multiplayer was an experimental mode in the playtest. Ho’s October 19 Next Fest update, posted on the game’s Steam news page, put co-op into the public demo along with multiplayer fixes and optimizations.
How a Main Sequence crew splits one asteroid belt
You start with one mining ship, scanning rock and refining ore on board. Then you build a station and lay out its factory floor by hand, in first person: machines, conveyor belts, production lines. Later the same logic stretches between stations, with automated supply routes and a fleet that hauls the ore and fights off the alien defenses your mining wakes up. The store page says the core progression is fully playable now, with ship and station design, trading, combat and automation, and it puts the current game at about 40 hours.
Forty hours is a month of Fridays, and a crew stretches that by splitting the jobs. The full release promises new factions, more ship and station modules, new production lines and more places to explore. Those are plans, and a server admin reads them as plans.
Ho's price post also lists planned Steam bundles with X4: Foundations, shapez 2 and Astrometica. Mythwright, which published Thronefall and Going Medieval, is pitching Main Sequence to space sim players and factory players at the same time. That is a big audience for a game one person has built.
If someone in the group likes to build alone, the launch discount on Steam makes this an easy first buy. For the Friday crew, wait until Ho puts a number on how many captains a server holds.
