Here is the full list of all 19 The Expendables 2 Videogame trophies - there are 17 bronze and 2 silver.
Play through an entire chapter with 4 player co-op
Complete the Campaign on Hardcore difficulty
Perform all 4 fully upgraded grab moves
Complete a mission on Hardcore without getting healed
Kill 50 enemies in a single combo
Complete chapter 4
Complete the Campaign on Casual difficulty
Kill 2000 enemies using melee attack or grabs
Complete all Challenges
Complete chapter 3
Complete chapter 2
Perform all grab moves, melee attacks and signature kills
Complete chapter 1
Heal 50 times
Use each weapon in the game to kill an enemy
Take out the weapons train
Interrogate the sniper
Blow the factory gates!
Complete a challenge