Libre Space Simulation Games
Libre Space Simulation Games
libregamewiki.org
Space simulation games
Several clones and original space-games, all available under an open licence.
I can recommend the 2D side-scroller Project:Starfighter, which is a fun and challenging play-through.
I can recommend Endless Sky if you are OK with the top down view.
I've been thinking of starting a new game recently and just staying out of politics and the main plotline as much as the game will let me, at least until I want to unlock more ships. I enjoy it a lot, but the main plot has always felt a bit on-rails for how open ended the gameplay is.