Kerbal Space Program Early Access-SANTA (PC-ENG-2013)

Kerbal Space Program is a multi-genre game where players create their own space program.In KSP, you must build space-worthy craft, capable of flying your 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 (or doesn't). So strap yourself in, and get ready to try some Rocket Science