I want to share with you a quick way to get the hardest trophy of the game which is "Carver Style" trophy.
Carver Style : Complete the game in Hard or Realistic.
First of all finish the game on "Easy" so you can get all trophies except "Carver style".
The game will auosave for each checkpoint. you have 20 missions so you will have 145 saves at the end of the game!! yes That's true!
If you load a mission or a checkpoint you can not change the difficulty. To do that , You have to choose 'new' which will delete all your previous saves (yes All!!) and start the game on the new difficulty that you choose on the main menu.
knowing that, When i finished the game i saved on Psn+ the 5 last checkpoints (Volcano1 to 5).
The reason why i did it was that i was wonderiing why the game should delete the gamesave to start the new one on a new difficulty. my first deduction was because they don't know manage the 2 differentes difficulties at the same time, meanning that the parameter file when it is set to hard or easy read the save no matter what was the initial difficluty.
I said ok let's give it a try and if my hypothesis was false ok i play the whole game on hard.
So i've started the game on hard and did 4 chapters.
Aterward i copied from PSN+ my own save (last checkpoint Volcano-5 done on "Easy") to my PS3.
i will just mention that it's not cheating but just a glitch of the game that you could exploit.
Then load the game and what was my surprise when i've seen the first 4 missions and a 5th one which was 'Volcano'!
bingo. so i load that checkpoint. the game has created the first checkoint Volcano-1 , that's normal.i quit and load again but this time the Volcano-5 which is the last checkpoint.
All i had to do was just to throw some grenades and rocket to kill the remaining soldiers and go to the last room and kill the final boss with my last grenade and ding 'Carver Style' + Ding... Platinum !
If this could help some of you that's fine (i think it will be patched Quickly, lol)