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Main Sequence

SimulationStrategyPCSoloDemo Live

About this game

Main Sequence is a first-person space-sim factory builder where you design spaceships, build space stations, and automate everything.

Install the free Steam demo.

Last checked 9 Nov 2026

Player receptionVery Positive86% positive · 241 Steam reviews ↗

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Main Sequence

Main Sequence is a first-person space-sim factory builder where you design spaceships, build space stations, and automate everything.

Player reception: Very Positive · 86% positive · 241 Steam reviews

Available on Steam (PC) — Demo Live, checked 9 Nov 2026.

More about Main Sequence

Main Sequence is a first-person space-sim factory builder where you design spaceships, build space stations, and automate everything. You start with a single mining ship in a resource-rich asteroid belt. Use scanners to locate mining sites, refine resources, and build a space station for operations. Factories on stations automate production via conveyor belts and modular design. Research unlocks ships, station modules, and upgrades. Combat ancient alien defenses while expanding into procedurally generated star systems with unique challenges like black holes. Co-op allows multiple players to specialize in logistics, defense, or exploration to build an empire.

Availability historyPast official availability changes
  • Opens SoonSteam · PC · 12 Oct 2026
  • Demo LiveSteam · PC · 17 Sep 2026
  • Demo LiveSteam · PC · 5 Sep 2026