This campaign is awesome. The first mission took me a few tries to get everyone together in one piece, as the pressure kept mounting, and you had very little time to perform your mission objectives. The rest of the missions kept me well under pressure, but I often failed because of one single thing that i needed to do within a few seconds. Nonetheless, all of the missions are well structured
The last few parts is unlike anything i have seen in a campaign. Not even including the special unique circumstances in the last mission,
The Red nebula and the derelict ships scared the everliving **** out of me, because i was all alone and helpless, and everything was silent, and i parked my ship near a derelict hunk of metal and waited. It's an irrational fear, next to warping inside Minefields in Freelancer. Don't ask.
, After an hour of pondering the end, i had finally understood everything. The entire ending, as well as the other ones i've seen here from my perspective I will now describe, so
BIG spoilers abound. If you have not played it yet, please do so, because this campaign is really, REALLY good.
Remember that you are being interrogated, and that you are telling your story. What you are experiencing in the end is something you can't quite describe in exact detail to your interrogators. It's not a nightmare, but it's in fact a premonition of things to come (because this is around the time where the Colossus has defeated the Sathanas).
What you remember is depending on the ending. I had only experienced the decent ending, and saw the other two described in this thread, and i have finally pieced it all together.
If you experience the worst ending, where you get destroyed in the nebula, you cannot describe anything to your interrogators, and they figure they should try again.
If you get the decent ending, where you survive your encounter in the nebula, but do not find the required object, as well as warp out, you get the decent ending. Your descriptions are too vague for them, and you overhear that the SOC is now commencing Operation Lion's Den. (If you played through all of Freespace 2, it wouldn't take long for you to figure out what this mission is) They will ask you to remember everything again.
True ending, You find the right target, and stay behind. you understand everything and see a premonition the final mission in Freespace 2. The reaction to your superiors is yet to be determined because i have not acquired this ending yet.
All in all, it was a great experience, and i felt under pressure, scared, confused, it made me think, and after figuring it all out, felt like my mind was blown. I keep calling this a campaign, when really it's not. It's much more than that.