
Originally Posted by
genome
I know someone who got the promotion from PSC to PFC without winning all 5 first missions (winning 4 and just repeating some of them multiple times). I also myself got the promotion from PFC to SP without beating lebros supplies. So I can guarantee both. It's easy to verify because you have a list of assaults you won at least once under your mission menu.
The rule is not 10 wins however. What I know works is winning 4 different (new) assaults, and then you can replace the fifth one with 5 wins in any already won (old) assault. That I know for sure works, from personal experience.
Just doing all 5 new assaults always works too of course.
What I also heard but haven't verified is that basically you need 25 hidden 'points' to rank up, each new assault you win gives you 5 points, every old assault you win gives you 1 point, and losing any assault gives you 0 points. This happens to fit what I said before, but also says that if you wanted to do just 1 type of assault ONLY, you would need to do it 21 times to rank up. So, just to be safe, in case this was trues, you'd be better off doing at least 4 different ones per rank.
Another rumor i heard is that it might go also by assault points, like 7000 new assault points after the last rank up will allow you to get promoted again. It might be whichever of these rules comes first, or some of these rumors might not be true, but the first part I mentioned above is true for sure.