Orbiter Space Flight Simulator is a free hardcore space flight simulator designed to give you a real feel for what space feels like.

Take note that this is not a game or a shooter. There are no trading stations, items to farm or anything that is game-like. Expect a steep learning curve for this simulation, but the result is worth it if you want a real, hardcore space simulation. You will spend a good amount of time learning the concepts of space flight and orbital mechanics.

Some of the things you can do in Orbiter Space Flight Simulator include launching the Space Shuttle from Kennedy Space Center and rendezvous with the International Space Station, recreate historic flights with addon spacecraft packages, plan interplanetary slingshots and tour the solar system with futuristic spacecraft.

You will also be able to find and explore new worlds, design your rockets or download addons created by other users, and learn about the concepts of space flight and orbital mechanics by playing and experimenting.

We have provided torrent links due to the large file size. At 2.4+ GB this does not include the Earth, Moon, Mars and other bodies high-resolution textures. We took a quick look and estimate that all the Orbiter Space Flight Simulator high-resolution texture packs can add over 50GB to the simulation. You can download them here.

Project Apollo - NASSP is an add-on for the Orbiter Space Flight Simulator.