Kerbal Space Program

Kerbal Space Program is a multi-genre game where the players create their own space program. You must build a space-worthy craft, capable of flying its crew out into space, without killing them. At your disposal is a collection of parts, which must be assembled to create a functional ship. Each part has its own function and will affect the way a ship flies. The Vehicle Assembly Building allows players to build spacecraft out of any imaginable combination of parts. It is fully-fledged, physics-based flight simulation ensures everything will fly (and crash) as it should. Take your Kerbal crew out of the ship and do Extra Vehicular Activities and procedural Terrain delivers detailed terrain at a vast scale.