The only problem with this game is that they never made 3rd installment. Other major pain-in-the-neck - lousy XP compatibility is gone now.
I still remember countless hours spent hunting Shivans with my trusty 3DFx Voodoo on board :)
To say something more about the game: many ships, differences between them, feeling that you are a part of a huge war effort, sinister and interesting aliens, wonderfully crafted missions.
A big flaw is that the game ends. Booo to that - get 2nd part if you haven't already as it's even better!