- Playtest Closing on May 27th - 22 May 2026
Greetings Commanders! After many months of working behind the scenes, it is almost time for the next stage of development for Main Sequence. This means that the playtest will be closing on May 27th in preparation for the upcoming demo launch. Thank you for participating in the playtest! The amazing community that has grown around the game is something that I didn’t expect when I started developing Main Sequence almost 3 years ago. Seeing what everyone has built in the game has been my favourite part of development so far, and I look forward to seeing what you build in the demo! Amongst other things, the demo features a total visual overhaul of the stations, ships, and factory machines. The demo addresses lots of the feedback that you’ve submitted throughout the playtest, but there are still more improvements and lots of new content to come in the Early Access release so keep the feedbac…
- Playtest Release 18 Patch 1 - 22 December 2025
Bug Fixes:Fixed an issue where loading a game after loading the Arena gamemode would always bring up the arena menu.Fixed Titanium Plates being listed as a harvestable resource instead of Titanium Ore in the map view.Ships will no longer try to go to disassembled docks.Fixed an issue where the player’s rotation would be tilted after boarding a station.
- Playtest Release 18 - 21 December 2025
This updates completely reworks the generation of the solar system, adding a whole new progression path up to producing Quantum Science that will require you to bring resources together from different sectors of the solar system. There are now 3 distinct biomes with each with different resources and abundances, which you can view in the updated solar system map.The Relic enemies have also been reworked, with new enemies, new enemy bases, and more varied attack patterns for existing enemies. Enemy generation can now also be disabled when creating a new world with the Peaceful Mode setting. When you destroy enemies, you can now harvest Relic Shards which you can use to complete the Relic Technology research for some powered-up items.To get all of the new content, make sure to start a new world in this update, just switching from an existing world will not generate the new content. Like al…
- Playtest Release 17 Patch 1 - 18 November 2025
Bug Fixes:Fixed elevators not despawning when deleting elevator modules.Fixed missing elevator console model.Fixed port colours not being set on elevator ports.Fixed the elevator not working when the bottom floor wasn’t at level 0.Fixed the elevator not working when the bottom segment was an elevator extender.Fixed player being teleported into space when walking into the corner of industrial and large docks.
- Playtest Release 17 - 16 November 2025
For details on how to switch to the experimental branch, see Release 15 patch notes.This update should finally address the issues with movement latency, especially at higher framer rates.In terms of new content, there are a variety of new ship and station modules that can be unlocked both through normal research and by trading at the Trade Outpost. Some highlights include a larger 2x2 bridge for piloting ships from, and stackable elevators that can move both players and items that should give you more flexibility when designing vertical bases.All of these new features and improvements should be available without having to start a new save, just visit the Trading Outpost to check for the new purchasable blueprints, or check in the Tech Tree.Features:Added stackable elevators that transport both people and items.Improved movement latency.Added the Small Bridge, a new piloting module for s…
- Playtest Release 16 Patch 2 - 23 October 2025
Bug Fixes:Fixed an issue where Enriched Fuel and Warp Fuel would disappear when used as fuel for reactors.Fixed Teleporter Pad window not showing other teleporters.Fixed Teleporter Pads not being able to be disassembled.Fixed decorations not costing items to build.
- Playtest Release 16 Patch 1 - 22 October 2025
Bug Fixes:Fixed an issue where the “open” and “save” buttons in the designer would not re-open after being closed.Fixed an issue with the item description for doorways.Fixed items not showing up on Tier 2 conveyor belts.
- Playtest Release 16 - 21 October 2025
For details on how to switch to the experimental branch, see Release 15 patch notes.This update adds a new gameplay loop: trading with NPCs at the Trading Outpost for new blueprints. There are also some changes to the world generation, with medium sized asteroids designed to make setting up your first factory easier, and rich resource asteroids to help realize your endgame ambitions.In order to unlock the new items at the trade station and try the new resource asteroid types, please start a new save.Features:Reworked NPC stations. Now, the Trading Outpost station has NPCs you can accept missions from to get credits, and stores where you can purchase new blueprints.Reworked the Warp Drive, renaming it to the Slipstream Drive. Now, the top speed at warp is determined by the fuel type used.Added the Containment Coil item.Added the Teleporter Pad, which can be purchased for Credits at the T…
- Playtest Release 15 Patch 1 - 6 October 2025
Features:Workbench and Designer can now use items directly from the player’s inventory.Bug Fixes:Fixed an issue with autopilot destinations being set for orders other than the one selected.Fixed the large container not refunding items.Fixed a crash when a null item was inserted into a container.Fixed a crash when loading empty save metadata.
- Playtest Release 15 - 5 October 2025
Playtest Release 15 is now available on the Experimental branch.IMPORTANT: Backup your save files before switching branches by going to the Main Menu -> Load Game -> Open Save Directory and copying the contents somewhere else.Future content updates to the playtest will happen on the experimental branch. If you'd like to be the first to test out these new features, follow the instructions below.Switching Branches:Go the main Steam page for the playtest and click the gear icon in the top-right.Choose "Properties" from the drop down menu, and find the "Betas" tabChange the Beta Participation to "Experimental"Features:Added Mk.2 and Mk. 3 versions of Conveyor Belts, Underground Belts and Splitter.Added Large Containers.Added Item Elevators.Added Industrial Docks.Added Capacitor item.Added Servo Plate item.Item filters can now be cleared.Added Wait for Time order to the Autopilot.Reworked Do…
- Release 14 Patch 3.1 - 27 September 2025
Bug Fixes: Fixed another flipped texture in the Shipyard. Fixed the Autopilot enable/disable not working.
- Playtest Release 14 Patch 3 - 26 September 2025
Feature: Assembler and Refinery now prompt the player to “Enable/Disable Port” and show the current port state. Add anti-aliasing method setting. Balance: Underground conveyors can now be extended across a 5 tile gap (underneath Assemblers). Updated the conveyor belt texture. Bug Fixes: Fixed another bug with the science labs stalling. Fixed another bug with the mining drones not being able to detect large asteroids. Fixed station self destruct only working once per session. Fixed Advance Plates tooltip showing the wrong research value. When enabling autopilot, the ship will restart its orders if they’ve been completed. When disabling autopilot, the ship will come to a dead stop if not being piloted. Fixed the designer disassemble mode not working after using eyedropper. Fixed “Enabled/Disabled” not being refreshed in the Autopilot window. Fixed current order not being saved. Fixed flip…
- Playtest Release 14 Patch 2 - 23 September 2025
Features: Added an FPS Limit setting in Graphics. Added an auto save interval setting in Gameplay. Balance: Switched the required/available item amounts in the Building Select menu. Bug Fixes: Fixed large asteroids sometimes not being detected by Mining Drones. Fixed Science Labs not working even when a technology is selected. Fixed ladders sometimes teleporting you out of the ship. Fixed drones not being disassembled when disassembling a Mining Drone Bay. Fixed RMB not cancelling Disassembly Mode. TAB should no longer open the chat. Chat does not send empty messages. Fixed Eyedropper not cancelling Disassembly Mode. Fixed the colour of Magnetic Coils on belts. Fixed paint colour not being applied to Right Armour piece.
- Playtest Release 14 Patch 1 - 21 September 2025
Features: Added profiles to the Cinematic Camera. Balance: Mining Laser damage increased 3/s >> 10/s Added station names to autopilot navigate-to-dock options. Bug Fixes: Fixed a crash when a client player exits a multiplayer game. Fixed Advanced Plates missing recipe. Added the total amount of mineable resources to the Drone Mining Bay. Fixed ships flying off into the void when trying to navigate to an occupied dock. Docks can no longer be disassembled when a ship is docked. Shipyard docks can now be renamed. Added VSync setting. Added Mouse Invert Y Axis setting. Fixed the Refinery audio not being affected by the Audio Settings. Renamed “Dual Cannons” to “Plasma Cannons”. Fixed paint colours not being applied to the Mining Laser. Fixed paint colours not being applied to the Station Elevator interior. Decreased radial menu dead zone. Added warnings to the Science Lab UI when research i…
- Playtest Release 14 - 11 September 2025
Features: Added ship autopilot system. You can now assign ships to fly between station docks and deliver items automatically. Access the ship autopilot in the status menu while piloting, or in the fleet menu with . Added a new research category: Computation Science. Now, most of the mid-tier research requires both Material and Computation Science. Computation Science is produced at Science Labs with Basic Circuits. Added paint customization for ships, stations, and characters. Added the Plasma Lance weapon. Added Advanced Plating item. Added lift and walkway station modules. Added windshield dust effect when piloting and improved the ship’s flight trail effect. Changed docking behavior so that the ship always docks at the closest available dock. Revamped the Research Tree visuals, adding more information to each technology card and tooltip. Add fire group configuration to the ship weapo…
- Playtest Release 13 - 30 August 2025
Features:New ships can be constructed and existing ships can be disassembled using Shipyard Core modules.Added a large thruster module.Added a ship container module. Each container added to the ship increases ship inventory max stack size by 50%.Ships and stations can now be renamed. Ships are renamed at the pilot seat, and stations are renamed at docks.All asteroids can now be destroyed, not just the mineable ones.Added window block and glass item, unlocked as part of Silica Refining.Added a 1x1 Station Corner module and removed the 2x2 Corner pending a rework.Ships can now be repaired from the pilot seat using Repair Packs, which can be crafted in the Assembler.Interior lights are now culled by distance, which should improve performance in large stations and ships.Added a new soundtrack.Added a link to the feedback survey to the pause menu.Balance:Solar Panels now require Reinforced G…
- Playtest Release 12 Patch 2 - 15 August 2025
Features: Added link to feedback form.
- Playtest Release 12 Patch 1 - 12 August 2025
Features: Added a credit screen to the main menu. Added a list of research items to the Science Lab UI. Balance: Changed the right-click inventory interaction to pick up half a stack instead of a single item. The inventory/status hotkey (Default: ) can now be used to close windows. Bug Fixes: Bullets don’t cast shadows anymore. Stats load properly when loading a blueprint in the designer. Fixed a crash when taking fuel out of the ship’s reactor. Fixed the shipyard not remembering docked ships when loading a saved game. Fixed the building effects not appearing when building machines. Fixed the colliders on the shipyard core and shipyard side. Fixed player ship bullet impacts not spawning. Fixed the throttle controls not working after exiting the map while piloting. Fixed mining laser beam not extending while firing. Fixed a soft lock condition where the ship has no more power and cannot…
- Playtest Release 12 - 9 August 2025
New Features: Changed the world generation to generate an entire star cluster. Added a new star type, the blue giant. Enemies now spawn individually instead of in groups. Reworked the enemy attack AI. Reworked the map. The map can now continuously scroll through all detail levels and shows more information when hovering over objects. Reworked the ship workstation UI. Items are now taken from the ship instead of the player inventory. Roll and Strafe controls are now independently rebindable. Added filtering to the drone bay. Added a new background music track. Bug Fixes: Fixed a crash when loading certain save files. Improved models for the dock and cockpit. Fixed the drone spawning in the wrong place in the drone bay. Fixed the colliders on the drone bay. Hull plates now show their research value.
- Playtest Release 11 Patch 1 - 23 July 2025
Bug Fixes: Fixed a crash when toggling the station HUD marker.
