Ok I had finished playing the Uncharted 3 campaign about 2 weeks ago on medium when I realized crushing mode was not unlocked. Do I have to complete it on hard to unlock crushing because I thought that playing it on medium would unlock it. I played it on medium throughout the whole game without changing difficulty and it would be very annoying if I had to complete the campaign two more times just to unlock both the Hard and Crushing trophy.
Hard mode is already unlocked without beating the game on any difficulty and crushing can be unlocked only by beating the campaign on Hard mode. Beating the game on normal difficulty will not unlock crushing.