Freespace is a classic example of pure space combat. set in the future, you are a pilot working your way up different squadrons. helpful training guides for different ships gives you all the tips and keys you will need to know to be a great pilot. there is a deep story and a rich environment, the graphics may not be up to date, but offer a pleasurable experience. if you are having trouble installing the game go to http://www.hard-light.net/forums/index.php/topic,42854.0.html and follow the instructions.
this is a great game and a must buy
Thank you GOG.com!