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Watch trailer on Steam ↗Main Sequence
Tumbling Dumpling Studio · Published by Mythwright
Last updated 27 Sept 2026
Main Sequence is a first-person space-sim factory builder where you design spaceships, build space stations, and automate everything. Start with a single ship and grow to become an interstellar industrial empire as you leave your mark on the galaxy.
Indie, Simulation, Strategy, Early Access · More free games
Design and command your own space fleet as you expand from a single ship into an industrial powerhouse in the simulation strategy game Main Sequence.
About this game
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About the Game
You are at the frontier of human-charted space in a small mining ship, tasked with expanding humanity's footprint amongst the stars. To succeed, you’ll need to collect resources, automate production, expand your base of operations, and research new technologies.
You start out with a single mining ship in a resource-rich asteroid belt. Use your scanners to find the best places to mine, and then refine the resources on your ship. Build a space station to set up a permanent base of operations which you can begin to expand and automate.
Onboard your stations, the factories you build are the heart of your industrial operation. Build machines, connect them with conveyor belts, and plan your production lines to keep everything flowing at full efficiency. Once that's running, that same logic extends across systems - automated supply routes between stations, and a fleet that keeps everything provisioned while you focus on expanding your operations.
Every ship and station is yours to design, inside and out. Module by module, you decide cargo capacity, reactor placement and weapons - whatever the situation calls for. Save designs to use again, share them with friends, or build freely in creative mode.
You'll need those weapons. Your industrial activity has woken something up - an ancient alien defence network that's identified you as a threat . Use your fleet to protect what you've built, or take the fight to them before the next wave arrives.
Research new technology with the items you produce. Each unlock opens up new ships, station modules, items and upgrades - everything you need to push further out. You will need to expand your industrial operations into new frontiers, but each new area will bring its own challenges and enemies to overcome. Use all of the tools at your disposal to build the ultimate battleship capable of handling any threat on your path to victory.
Venture into the unknown, with each procedurally generated star system offering unique logistic challenges to overcome. Explore wrecks, find new resources, and discover stellar phenomena such as black holes and neutron stars. Meet allies along the way as you uncover the different factions within humanity, and choose who to help as you build your legacy amongst the stars.
Play solo, or in co-op where each player is the captain of their own ship. Divide responsibilities however you like - one on logistics, another on defence, another out exploring - or work side by side on the same objective. Co-op opens up what’s possible. The bigger the crew, the bigger the empire.
Satisfactory, Factorio, Dyson Sphere Program, Space Engineers, Foundry, X4 Foundations, Stationeers, Empyrion Galactic Survival, Planet Crafter, No Man’s Sky, Astroneer, Subnautica
System Requirements
Will my PC run this? →Minimum
- Requires a 64-bit processor and operating system
- OS: Windows 10 64-bit
- Processor: Intel Core i5-8400 or equivalent
- Memory: 8 GB RAM
- Graphics: Nvidia GTX 1050 or AMD RX 460
- DirectX: Version 12
- Storage: 5 GB available space
Recommended
- Requires a 64-bit processor and operating system
Supported Languages
Latest news
AnnouncementsOfficial
Playtest Week
Greetings Commanders!Since the launch of the demo I’ve been busy working on lots of new content and improvements. It’s been a year now since the first playtest. Getting your feedback has always been the best way to improve the game, that’s why we are running another playtest for Main Sequence starting next week on September 17th.Playtest WeekUnlike the playtest last year, this playtest is only going to be available from September 17th to September 25th. During that time you’ll have access to the full content of the game, and I’m excited to see how far you make it in a week.The demo will remain available during that time and so to access the playtest you will have to sign up separately, and it will appear as its own app in your Steam library. If you have signed up for the previous playtest, you won’t get a notification when it goes live so make sure to check your Steam library on the 17th and you should see the playtest available.New Playtest ContentThere’s a lot of new content you’ll be able to discover and build in the playtest. Starting from where the demo leaves off with the Slipstream Drive research, you’ll have to travel to other sectors of the solar system to mine Cobalt and Graphite in order to make Electromagnetic Science and Quantum Science. You’ll be able to discover abandoned stations, and visit the Trading Outpost to unlock new blueprints and modules.Once you defeat the Relic Destroyer that is lurking on the edge of the solar system, you’ll be able to research the Interstellar Warp Drive and travel to other star systems where you’ll find the resources to research Astronomic Science and Xenobiologic science to unlock the ultimate late-game equipment and modules.MultiplayerAn experimental version of multiplayer will be available in the playtest, so invite a friend to playtest to expand the scale of your industrial operation even further. You are more likely to encounter some and performance issues in multiplayer, but improving the performance and stability...Read full article on Community Announcements (lilystar)AnnouncementsOfficial
Thank You for 100 000 Wishlists!
Greetings Commanders!It has been almost 2 weeks since the Demo went live, and it's been great to see so many players both returning from the playtest and checking out Main Sequence for the first time. Thanks to your support, Main Sequence now has more than 100 000 wishlists!It has been great to see lots of new feedback for the Demo. Because Main Sequence combines many genres, as the game reaches new players there are many different expectations for what kind of game Main Sequence is and can be. Being able to customize your experience in Main Sequence so that you can focus on the parts of the game that you enjoy the most is something that I will keep working on for the Early Access release. Some of these features, such as peaceful mode, are already in the demo and there will be more to come to scale the difficulty of things such as combat, research and automation requirements.Thanks again for continue to support Main Sequence. More updates to come soon!Cheers, KaidenRead full article on Community Announcements (lilystar)Patch NotesOfficial
Demo Hotfix 2
Bug FixesFixed an error where the Landing Gear were not unlocked when editing a ship.Fixed an issue with refining Enriched Titanium/Nickel Ore at the ship workstation.Read full article on Community Announcements (lilystar)Patch NotesOfficial
Demo Hotfix 1
Bug FixesFixed a crash when opening the ArenaFixed an issue where changes could not be applied to ships even with enough items available.Fixed an issue where loading a saved blueprint could allow you to build a module that had not been unlocked yet.Fixed an issue where you could clip out of the dock walkway.BalanceEnriched Titanium/Nickel Ore crafting time reduced from 6s >> 3sThere is an issue currently being investigated causing issues on AMD RX500 series cards. While this issue is being investigated, try updating your graphics card drivers or else skipping the tutorial.Read full article on Community Announcements (lilystar)AnnouncementsOfficial
Demo Available Now!
Greeting Commanders! Today is a big step forward for Main Sequence. After many months of gathering feedback from the playtest, the Demo is finally ready and available now!The demo features many improvements and additions, including a complete visual overhaul of the ship, stations, and factories. There are new tutorials to help guide you through the early game, and some longterm objectives to strive for. Some of the new features include:New cobalt refining and ore enrichment production lines.New star types and biomes.New enemies and enemy attack patterns.Lots of quality of life improvements.In addition to the new Demo going live, I also have another exciting announcement: Main Sequence is going to be published by Mythwright, the UK publisher behind Thronefall, Going Medieval, TerraTech Legion and more.The team at Mythwright specializes in publishing indie games by small teams and solo developers like myself. What this means for Main Sequence is that I will be able to focus entirely on making the game the best that it can be, and be able to count on their experienced team to handle all of the complexities of getting that game out to all of you! Thank you for following along with the development of Main Sequence so far. You can leave reviews on the Demo, so please check it out and share your thoughts. If you want to get even more frequent development updates and share your creations with other Main Sequence Commanders, check out our official Discord and the Steam Community.Cheers,KaidenRead full article on Community Announcements (lilystar)
