meridian spaceflight simulator

Meridian: Stellar Drift is a 2D space sandbox simulator built by me from the ground up — and it's currently a test build. Many features are still being polished, but the core flight experience is already playable.

I'm a space enthusiast from China, with no professional aerospace background — just a deep love for rockets and orbital mechanics. I made this game in my spare time because I wanted more people to feel that slow, deliberate climb from the launch pad to orbit. No flashy explosions, no arcade nonsense — just honest physics doing its thing.

You start on a 20×60 assembly grid and build your rocket part by part — command pods, fuel tanks, engines, decouplers, heat shields — snapping them face to face. Three propellant families each have their role: chemical stages punch through the atmosphere, while ion deep-space stages need to be in orbit before they can even fire (1.5t thrust, but 1200s specific impulse).

Under the hood: an 8-layer US Standard Atmosphere model, real Earth gravity, Tsiolkovsky Δv summed stage by stage. Dynamic pressure, center of pressure, and angle of attack shift in real time as fuel burns away. Exceed the heat shield limit on reentry and the accident report will tell you exactly when, where, and what to fix next.

Controls balance depth with accessibility: 5-stage separation points you can drag freely, side boosters that auto-jettison when empty, and an ascent autopilot that handles the gravity turn for you. Once in orbit, switch to prograde mode, crank up time warp, and watch that white trajectory line push your apoapsis higher and higher.

⚠️ Current Build Notes:

This is a test/early version. Bugs and rough edges are expected — feedback in the comments is greatly appreciated!

Chinese language only at the moment. English localization is planned for a future update.

More parts, additional celestial bodies, and English UI are on the roadmap.

No racing. No enemies. You just show up — and let gravity steer.