Spaceflight sandbox · Windows & Linux · Early Access first
The Astraea
Program
Design rockets part by part. Fly them on real orbits around a star of twenty-two worlds. Land on Luma, step outside, plant a flag, and bring your pilot home.
01 · The home system
One star.
Twenty-two worlds.
Every planet and moon runs on its own Kepler orbit around Astraea, a calm yellow-white dwarf. Distances are compressed here so it fits a screen. In the game they are real.
02 · Vehicle
Luma Pathfinder
03 · Flight 01 · Tellus – Luma – Tellus
Flown, not animated.
The whole round trip was flown in the game by its test pilot through the normal ship controls. Every number below is from that flight's log. 21 of 21 mission checks passed.
04 · Physics
No rails. No cutscenes.
What you build is what flies. Mass, thrust, drag and heat come from the parts. The art can't make a rocket fly differently.
05 · Captures
From the current build.
Frames recorded on 5 November 2026 while the game's autopilot flew its own tests, game HUD included. Work in progress.
06 · Devlog
Notes from the build.
What changed in the game and how it works, shown in the game itself.