Main Sequence Beginner Guide: First Ship, First Station, First Factory

Price, discount and the Early Access plan

Main Sequence costs $24.99 on Steam. A 20% launch discount cuts that to $19.99, and the introductory offer ends on November 26, 2026. After that date the price goes back to $24.99 until the developer changes it, so buy before November 26 if you want the lower price.

Early Access means the game is still growing, but it is not a bare shell. The core mechanics and progression are fully playable now, with around 40 hours of content in the current build. The developer expects Early Access to last 1 to 2 years, and the 1.0 price will be adjusted to reflect the progress and content added. The game is PC only, on Windows, through Steam, and no console version or other PC store has been confirmed. A free demo is live on Steam, so try the loop before you pay. Main Sequence also appears in 15 launch bundles on Steam, including bundles with X4: Foundations, Astrometica, Avorion and shapez 2.

What kind of game is Main Sequence

Main Sequence is a first-person space sim factory builder, and both halves matter. You fly your own ship in first person, and you build factories that turn raw rock into useful things. You start small: a small mining ship, a scanner, a refinery on board, and a resource-rich asteroid belt. From there you grow into a space station that never moves, factories that run on their own, supply routes between stations, and a fleet that can fight back.

The loop runs in a clear order. First you scan the belt to find mining spots worth your time. Then you mine the rock and refine the resources on your ship. Then you use those refined resources to build your space station, your permanent base, and factories inside it, with machines and conveyor belts that turn raw resources into finished items. Then you set up automated supply routes between stations, so materials move without you hauling them by hand.

Exploration is the other half of the game. The star systems are procedurally generated, so every player gets a different map to explore. Out there you can find wrecks, new resources, black holes and neutron stars. New finds feed the research that unlocks the next tier of ships and station modules.

Your first hour: scan, mine, refine, build

Follow these steps in order, and do not skip ahead to station building before your mining and refining are steady.

1. Scan before you mine. A good mining spot is worth far more than the nearest rock, and scanning costs minutes while blind mining costs hours.
2. Mine close to home and refine on your ship. Refined resources are worth the trip, and fewer trips mean more time building.
3. Pick a station site and commit to it. Your station is a permanent base, so choose a spot near good mining with room to grow.
4. Build one factory line that works, then grow it. Start with machines and a conveyor belt that turn one resource into one useful item, end to end.
5. Automate the boring trips. Set up a supply route between your stations so materials move on their own, and spend the saved time exploring or researching.

Design every ship and station module by module

Main Sequence does not hand you fixed ships. You design every ship and every station module by module. Cargo holds, reactors and weapons are the parts the developer names. More cargo means longer mining runs. A stronger reactor means more power for everything else. Weapons mean you can fight instead of running. Every module costs space, power or resources, so a good design is a set of choices, not a pile of parts.

The same thinking applies to stations. Keep the path from raw resources to finished items short, keep your machines close to the belts that feed them, and leave room to add modules later. You can save your designs and share them. A creative mode lets you test designs without survival pressure.

Research opens new ships, modules and upgrades

Progress runs on research, and research runs on the items you produce. Feed the items your factories make into research, and each unlock opens new ships, station modules, items and upgrades. A factory is the engine that unlocks the next tier of everything.

The beginner mistake is to research at random. Ask what your next bottleneck is first. If trips are too short, research cargo or a better ship. If the factory is starved of power, research a better reactor. Research that fixes your real bottleneck pays for itself.

The alien defence network will notice you

Main Sequence is not a quiet building game. Your industrial activity wakes an ancient alien defence network, and it sees you as a threat. The more you mine, build and expand, the more attention you draw, and the network answers with force. That is why the game gives you weapons and a fleet.

Plan for that fight before it arrives. A station with no defences and a fleet of unarmed mining ships is a soft target, and rebuilding after a bad attack costs far more than preparing for one. Keep at least one ship in your fleet fitted for combat.

Solo or co-op, and what your PC needs

You can play solo, or in online co-op where each player is the captain of their own ship. Every player flies their own vessel, mines their own belt, and builds alongside the others. The developer has not confirmed a player cap or dedicated servers, so do not plan a large group around either one yet.

The game is made by Tumbling Dumpling Studio, the one-person studio of Kaiden Ho in Ottawa, Canada, in development since 2023. The publisher is Mythwright, a UK publisher behind Thronefall, Going Medieval and TerraTech Legion.

The specs are friendly for a 2026 release. The minimum asks for a GTX 1050 or an AMD RX 460 with 8 GB of RAM and only 5 GB of storage, so most gaming PCs from the last several years can run it. The recommended spec steps up to an RTX 3060 Ti with 16 GB of RAM. The game also supports 10 interface languages.

Six beginner tips for your first session

1. Play the free demo first. It is live on Steam, it costs nothing, and it teaches you the mining loop before you spend $19.99.
2. Scan before you mine. A scanned belt is a planned belt, and a planned belt pays for the whole session.
3. Refine on your ship and travel light. Raw rock is heavy and low value, and fewer trips mean more time building.
4. Build one working factory line before you build five. A single line that runs end to end beats a station full of unconnected machines.
5. Research your bottleneck, not the shiniest unlock. If power is the problem, research power. If cargo is the problem, research cargo.
6. Keep a combat ship ready. The alien defence network wakes up as your industry grows, and one armed ship is cheap insurance for a station you spent hours building.

Main Sequence questions

How much does Main Sequence cost?

Main Sequence costs $24.99 on Steam, with a 20% launch discount that brings it to $19.99. The introductory offer ends on November 26, 2026. The price for the finished 1.0 release will be adjusted to reflect the progress and content added during Early Access.

Is Main Sequence single-player or co-op?

Both. You can play solo, or play online co-op where each player is the captain of their own ship. The developer has not confirmed a player cap or dedicated servers, so do not plan a large group around either one until that is announced.

Is there a free demo for Main Sequence?

Yes. A free demo is live on Steam, so you can try the game before you buy it. The full game entered Steam Early Access on Thursday, November 12, 2026, and the current build holds around 40 hours of content.