Orbiter is described as 'Realistic 3D real-time space flight simulator program' and is an game in the games category. There are more than 10 games similar to Orbiter for a variety of platforms, including Windows, Steam, Linux, Mac and Android apps. The best Orbiter alternative is Space Engine. It's not free, so if you're looking for a free alternative, you could try Zen Koi or Pioneer. Other Orbiter like games are Children of a Dead Earth, Universe Sandbox, Spore and Elite: Dangerous.
Reentry is a space flight simulator based on real life spacecrafts. You create a new astronaut, gain levels and experience for every move you make by completing missions in space.
