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