Spaceflight Simulator

Spaceflight Simulator puts you in charge of a private space programme rendered in clean 2D, where the maths underneath is taken seriously. You design rockets from a parts catalogue modelled on real-world hardware, manage thrust-to-weight ratios, plan trajectories around accurate gravitational pulls, and execute landings on bodies that each have their own atmospheric density, terrain and approach geometry.

The parts list covers what you'd expect from a hard-physics builder. Twenty fuel tank sizes and configurations, six propulsion families plus a reaction control system, thirteen fairings with assorted nose and side cones, capsules, probes, payload systems, separators and docking ports, landing legs, parachutes and wheels — each part with its own mass, aerodynamic profile and behaviour. Multistage vehicles are first-class objects: you choose when stages separate, when secondary engines ignite, and how aggressively to roll into a gravity turn.

Twelve destinations are modelled with real gravity and atmosphere, from Earth and the Moon to Mercury, Venus, Mars and its moons Phobos and Deimos, on to Jupiter and the four Galilean satellites Io, Europa, Ganymede and Callisto. Your save persists across launches, so the same world fills up with the satellites, rovers, space stations and abandoned upper stages you've left behind. The Steam release bundles all expansion packs into the base game, and most of the long-tail play is about chasing real-world-style mission profiles or recreating historical rockets with the parts at hand.