Here is the full list of all 51 Spec Ops: The Line trophies - there are 42 bronze, 5 silver, 3 gold and 1 platinum.
Unlock all Trophies.
Complete game on "FUBAR" difficulty.
Kill 10 enemies while they use zip lines or are rappelling. (campaign only)
Complete three chapters in a row without being killed or reloading a checkpoint.
Complete any chapter with 60%+ accuracy without dying or reloading a checkpoint.
Play it smart.
Kill 50 enemies using only the Attack Command. (campaign only)
Follow your orders.
Show mercy.
Choose restraint.
Sprint into cover 10 times while under fire. (campaign only)
Live and let live.
You are relieved.
Live and let die.
Complete game on "Suicide Mission" difficulty.
Complete game on "Combat Op" difficulty.
Complete game on "Walk on the Beach" difficulty.
Carry on, soldier.
The end of the line.
Recover all Intel Items.
Blow up 10 explosive objects, killing at least one enemy each time. (campaign only)
Choose vengeance.
Get out of here!
Stand united.
Kill 75 enemies with any shotgun. (campaign only)
Save a bullet.
Kill 150 enemies with any heavy weapon. (campaign only)
Kill 350 enemies with any rifle. (campaign only)
Kill 50 enemies with any sniper rifle. (campaign only)
Kill 250 enemies with headshots. (campaign only)
Kick an enemy by vaulting over a cover. (campaign only)
Buck the chain of command.
Play it loose.
Recover 12 Intel Items.
Kill an enemy by tagging him with a sticky grenade. (campaign only)
Kill 50 enemies with grenades. (campaign only)
Kill 5 enemies using blind fire. (campaign only)
Stun an enemy by dumping sand on their head. (campaign only)
Face the horrors of war.
Kill 4 enemies with a shotgun in 10 seconds or less. (campaign only)
Kill 100 enemies with any pistol or SMG. (campaign only)
Kill an Edged Weapon Expert while he is up to 5 meters away. (campaign only)
Hit 10 enemies with your melee attack. (campaign only)
Engineer an exit strategy.
We have contact.
Kill an enemy just as they are throwing a grenade. (campaign only)
Look out below.
Kill 3 enemies with a single grenade. (campaign only)
What's lost is found.
Recover one Intel Item.
Kill an oryx. (campaign only)