Microsoft Space Simulator
It was one of the first general-purpose space flight simulators and it incorporated concepts from astrodynamics, motion, and celestial mechanics.The graphics featured dithered gouraud shading 3D vessels, with texture mapped planets, moons, and deep-sky objects.Atmospheric effect are not modeled and all planetary surfaces are treated as flat spheres.A limited collision detection between vessels is implemented by using docking ports.PC Gamer gave the simulator a score of 84% in its September 1994 issue, praising its graphics and realistic approach to space travel, while criticizing the poor or non-existent sound and the interface.