Nomad (also known as Project Nomad) is a 1993 computer game developed by Intense! Interactive and Papyrus Design Group, Inc. and published by GameTek. It is a cross between a simple space simulator, a trading game and an adventure.

"Best described as a space opera, Nomad is a story of good vs. evil. An alien ship crashes to Earth, giving mankind the technology needed to venture outside of our solar system. But all is not well: an evil race of robotic aliens is rampaging through the galaxy and you can guess who's job it's going to be to stop them."

I request a full longplay of this obscure game! Before finishing the game, I humbly wish to see you establishing good dealings with all the alien races featured in this game and learn of their history. That's what I like to see in a Sci-fi game.

http://en.wikipedia.org/wiki/Nomad_%28video_game%29
http://en.wikifur.com/wiki/Project_Nomad
http://www.mobygames.com/game/nomad
http://superadventuresingaming.blogspot.se/2011/09/nomad-ms-dos.html
http://www.gamefaqs.com/pc/581734-nomad/faqs/15671 (Recommended for thorough study on this walkthrough before playing the game)

Good luck!