Endless Sky is described as 'Explore other star systems. Earn money by trading, carrying passengers, or completing missions. Use your earnings to buy a better ship or to upgrade the weapons and engines on your current one. Blow up pirates. Take sides in a civil war' and is a exploration game in the games category. There are more than 10 games similar to Endless Sky for a variety of platforms, including Windows, Linux, Mac, Steam and Web-based apps. The best Endless Sky alternative is NAEV, which is both free and Open Source. Other Endless Sky like games are Destination Sol, Transcendence, SolarWolf and The Ur-Quan Masters.