It's your classic space fighter game, obviously taking place in the distant future where space travel and other life is not a new thing. You're a pilot in the middle of a war and you learn controls for your space fighter and you can customize weapons and stuff (you get training mission too). Out of the blue, your species (Terrans) and the enemy specices (Vasudents) are attacked by another alien species and you and the Vasudents must ban together to survive.
http://en.wikipedia.org/wiki/Freespace

It also has a sequel where everyone has shields and new weapons and more challenges.
http://en.wikipedia.org/wiki/FreeSpace_2

We got a copy of this game for free when my dad brought our first computer ^^ back when it was a $100 game still xDD lol its a great game :) my dad spent hours upon hours playing it, haven't touched it in years tho xD

Same here. My dad, one of my brothers and myself would spend a lot of time playing the games and we ould actually yell at the screen if we got blown up. Those are the days