Orbital mechanics and orbital maneuvering for your space game.Consider Gravity Engine 2 (by the same author) for new projects. Comparision(Gravity Engine is actively supported)Gravity Engine provides a complete toolkit for your space game physics.- add stars, planets and spaceships that interact via gravitational N-body or "on-rails"- design orbits by shape and see their paths in the editor and scene- manual orbit changes with clickable handles- orbit transfers/rendezvous from any orbit to any orbit- rocket engines with staging- model of Earth atmosphere- solar system builder: add any object in the JPL database- use real-world units (km/AU, kg)- full support for particles- highly accurate double-precision physics, with a choice of algorithm/Kepler evolution- control of overall evolution speed, scale and CPU useIn-scene extensible command line console for development and debug- change gravity to any force you designNo programming or math required.Release Notes and DocsComplete source code provided.Developed by a professional programmer with a PhD in astrophysics.