Play ORBITAL is a rocket physics simulator that runs entirely in your browser — no install, no account, no internet after the first load. Built as a single 177KB HTML file with zero dependencies.
You design your rocket stage by stage, ignite the engines, and fight gravity in real time. The physics are real: Kepler equations, Tsiolkovsky rocket equation, exponential atmospheric density, aerodynamic drag. Every number you see on the HUD — altitude, velocity, G-force, heat — comes from actual equations, not approximations.
🎮 WHAT YOU DO:
• Build your rocket from 18 parts across 4 categories (capsules, engines, tanks, structure)
• Stack multiple stages — separate them mid-flight when fuel runs out
• Reach orbit at 400 km, complete a full orbit, survive reentry, land with a parachute
• Unlock 9 achievements and complete 10 missions including the Moon and Mars
• Use the full autopilot for a hands-free mission, or fly manually with the joystick
🚀 QUICK BUILD presets get you flying in seconds — or drag and drop parts in the visual constructor.
📱 Designed for mobile — works on any phone or tablet, portrait mode, touch controls.
💲 $2.00 — one-time payment, no ads, no microtransactions.
🔗 https://orbitalbymicos.itch.io/orbital
Feedback and bug reports welcome in the comments!