I haven't platinumed the game yet, but I did the VR missions. They definitely were not fun. The only one I have left on that one are the dog tags.
are the 35 hours in just one run, or in all?
One run requires you finish the game in over 35 hours, among some other requirements. The emblems required you to do some stupid shit, finish the game with less than 250 kills but more than 250 alerts, for example. WTF is that shit yo.