To get this trophy, you must beat the game and collect all the collectibles. The criteria you must meet is as follows:
* Completing the game on any difficulty.
* Collecting all 15 weapon upgrades.
* Completing all 18 optional objectives.
* Collecting all 20 playing card sets.
* Uncovering all 22 sniper nests.
* Collecting all 60 war diaries.
* Completing all 8 long shots.
Once you complete all of the above criteria, the trophy will unlock. Credit for the video guide goes to 360GameTV.