Fyi, you have to complete the skirmishes on Hard mode too. I completed the game 2 times and didn't know why I didn't get the Randgriz Crest of Honor. Third playthrough I did the skirmishes on Hard and got the platinum. Anyways thanks for the video.
On the Steam/PC version you actually don't have to complete the skirmishes on Hard mode but you do on both Easy and Normal modes. The PS version may be different. I had a similar experience that I mention at the end of this video, my 3rd or 4th Game +1 playthrough and I still couldn't unlock the last medal.... ended up once you get to Chapter 8 or 9 in Game +1 a new Castlefront St story becomes available (the one where Ellet sneaks into the Royal party), its only like 3 videos with no playable missions but once I watched those I instantly got the Gallian Front Commemorative. I was soooooo annoyed.....
drunkerd_ninja Ah that's why then. I'm playing the PS4 remastered version. Did everything you mentioned but was only missing the skirmishes on hard mode. Guess that's the only difference between the PC and PS4 version. Well, thanks again. This platinum wouldn't have been possible without you. 👍