Bussard

Bussard is an open-world space trading and programming game that tries to realistically simulate orbital mechanics. Players take control of an individual spacecraft by directly controlling its thrusters, and through the on-board computer that is a fully-programmable Lua environment, allowing the player to write code, in-game, to assist with navigation and piloting. Throughout the world are computers, located on space stations and planets, which mimic a Unix-like environment that can be connected to from the ship's computer text-interface, facilitating trade and story progression via in-game mail.