Endless Sky

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. Or leave human space behind and
hope to find some friendly aliens whose culture is more civilized than
your own...

Endless Sky is a sandbox-style space exploration game similar to
Elite, Escape Velocity, or Star Control. You start out as the captain
of a tiny space ship and can choose what to do from there. The game
includes a major plot line and many minor missions, but you can choose
whether you want to play through the plot or strike out on your own as
a merchant or bounty hunter or explorer.

See the player's manual at
https://github.com/endless-sky/endless-sky/wiki/PlayersManual for more
information, or the home page (https://endless-sky.github.io/) for
screenshots and the occasional blog post.