After purchasing the Sins of a Solar Empire Rebellion - Original Soundtrack on Steam, I noticed that it is missing many tracks that are in the game. I then did as I tend to do when something makes no sense, and painstakingly went through and found the stuff not present, those being (using the names they have in the game's sound folder, for I know not what their official titles are):
edit: spoilers don't seem to work for some reason
Advent Battle 2
Advent Quiet 2
Battle 7 (13 - Relentless seems to be the same track, but in a lower key. Perhaps we could have both? )
All tracks labelled as "Quiet" are missing (all 11 of them)
(Also, why is there no "Quiet 3"? Naming error? Cut content? Same fate as the old Vasari Empire?)
All tracks labelled as "Sad" are missing (all 3 of them)
TEC 3 (Actually, this track goes unused in the game, for what ever reason, and it would be nice to see it added to the TEC music lineup. After all, the content is there, no changes other than adding it to both TEC factions, something one can already easily do.)
TEC Quiet (14 - Birth of the Coalition is similar, but by no measure is it identical)
All tracks labelled as "Upbeat" are missing (all 3 of them)
Now I'm sure I got them all, so do tell if I listed any that are included, or missed one that isn't.
Also, there is one case of the reverse: a track present with the soundtrack, but not to be found anywhere in the game's files. That track is "8 - Peace and Prosperity". Where did it come from? Where did it go? Where did you come from, Cotton-Eye Joe? Is it the missing Quiet 3?