Here is the full list of all 51 Apache: Air Assault trophies - there are 42 bronze, 5 silver, 3 gold and 1 platinum.
Earn all available Trophies for Apache: Air Assault
Complete the Campaign and Squad Operations
Win all Squad Operations missions in any flight mode
Unlock all skins for all helicopters
Win the “Domination” mission in Squad Operations
Complete free flight with each helicopter
Complete a landing at a landing zone in Realistic or Veteran difficulty
Enable setting “Control Turret in Zoom” and kill 5 enemy infantry by gun in this mode
Complete a specific mission objective in "Holidays in Hell" in Local Co-op mode
Win any 3 missions from the Campaign in Local Co-op on any difficulty
Complete a specific mission objective in "The River Deep" in Local Co-op mode
Complete a specific mission objective in "Lord of War" in Local Co-op mode
Complete a specific mission objective in "Whiteout" in Local Co-op mode
Using the 30mm cannon, kill 20 enemy infantry without letting go of the trigger
Unlock twenty decals
Kill 9 enemy air units with the FIM-92 Stinger missiles
Win any mission on Veteran difficulty
Play the Credits
Complete the Campaign
Finish Africa Chapter on Realistic or Veteran difficulty
Complete specific mission objective in "Ship of Fools"
Finish Amazon Chapter on Realistic or Veteran difficulty
Complete specific mission objective in "Turkey Shoot"
Finish Tazirstan Chapter on Realistic or Veteran difficulty
Complete "A Damn Shame"
Complete specific mission objective in "Rain in the Desert"
Complete all secondary objectives in Campaign mode
Complete a specific mission objective in "City on Fire"
Complete specific mission objective in "A Diamond in the Rough"
Complete a specific mission objective in "Sunshine Units"
Kill 8 ground units with one Hellfire ripple shot
Complete a specific mission objective in "On the X"
Kill 114 enemy ground units with the AGM 114 Hellfire missiles
Complete a specific mission objective in "The Gang’s All Here"
Complete a specific mission objective in "Over and Out"
Play one mission entirely in cockpit view
Complete a specific mission objective in "Sharks in the Water"
Kill 70 enemy ground units with the Hydra 70 rockets
Win one Squad Operations mission in online Co-op mode
Avoid 15 incoming missiles
Complete any mission without dying on any difficulty
Use satellite view in each location
Watch a replay
Do a barrel roll!
Unlock all chapters
Kill 30 enemy ground units with the 30mm cannon
Complete a specific mission objective in "The Sky is Burning"
Start "The Sky is Burning" mission
Complete “Takeoff” mission
Post scores to all Leaderboards
Kill 10 enemy infantry in FLIR view