It's been a while since i've played Freespace, but i play a lot of Freespace 2 (not the main game, but campaigns and MODs for people).
i still don't know how to beat the last mission on FS2 (where you're escorting an orion)... that was like 2 months ago.
i went through the entire campaign (and all the "loop"s) on medium without dying once, and i got to this mission and died, so i stopped playing (i haven't played it again since, but i've got to try sometime)
i played for like 5 hours straight, went all through the campaign. it was fun. i can't wait to see the end-game cutscene though...