From a single mining ship to an interstellar industrial empire — your legacy begins in the void. Developer Tumbling Dumpling Studio and publisher Mythwright have announced that Main Sequence, the first-person space-sim factory builder, blasts into Steam Early Access on November 12, 2026.
Start Small, Grow Beyond Measure
You begin alone at the edge of charted space, aboard nothing grander than a humble mining vessel. Your mission: harvest resources, refine materials, and build — station by station, ship by ship — an industrial network that stretches across the stars.
- Mine & Refine — Scan asteroid belts, extract ore, and process materials directly on board your vessel
- Build & Automate — Construct sprawling space stations with conveyor belts, production lines, and fully automated supply routes between outposts
- Design & Deploy — Engineer every ship and station module by module — cargo bays, reactors, weapons, and aesthetics are entirely yours to shape
- Defend & Expand — Your industrial activity has awakened an ancient alien defence network. Protect your factories with custom-built fleets — or take the fight to them
- Research & Explore — Unlock new tech, venture into procedurally generated star systems, and uncover black holes, neutron stars, and lost civilisations
Solo or Side-by-Side — The Choice Is Yours
Main Sequence supports both single-player and online co-op, where each player commands their own ship. Divide roles — one managing logistics, another exploring, a third on defence — then combine your strengths to build something far bigger than any one empire could be.
What to Expect in Early Access
| Detail | Info |
|---|---|
| Launch | November 12, 2026 (Steam Early Access) |
| Early Access Duration | 1–2 years, with full release when content is complete |
| Playtime | ~40+ hours of content at launch — deeper for automation fans |
| Modes | Single-player + online/LAN co-op |
| Demo | Free demo available now on Steam |
| Languages | English, French, German, Spanish, Japanese, Korean, Polish, Portuguese-Brazil, Russian, Simplified Chinese |
| Specs | Windows 10 64-bit, i5-8400, 8 GB RAM, GTX 1050 / RX 460, 5 GB space |
| Community | Discord + built-in feedback channels shaping development |
The roadmap ahead includes new factions, expanded ship and station modules, additional production chains, and more mysteries to uncover — all guided by player feedback.
Wishlist Today — Secure Your Place in the Stars
The free demo is live right now — try before you blast — and the Steam page is open for wishlisting. Whether you dream of optimising perfect factory lines, designing the ultimate battleship, or exploring the unknown, Main Sequence is where your empire begins.
Head to the Main Sequence Steam page
Find out more here
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