FFS it only unlocks "You've earned it" (Complete on Veteran) and "Audiophile" (all Rorke files)...
Seems like there aren't any savesets anywhere and you have to do the extinction trophies yourself even in the case of having a saveset anyway.
Fuck this platinum and fuck this game! Never wanna see it again because it's a disgrace. Tedious trophies, terrible multiplayer and trash campaign/co-op.