Here is the full list of all 51 Spec Ops: The Line trophies - there are 42 bronze, 5 silver, 3 gold and 1 platinum.
You are relieved.
Choose vengeance.
Follow your orders.
Play it smart.
Recover all Intel Items.
Live and let die.
Kill 10 enemies while they use zip lines or are rappelling. (campaign only)
Save a bullet.
Kill 150 enemies with any heavy weapon. (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.
Live and let live.
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.
Choose restraint.
Kill 100 enemies with any pistol or SMG. (campaign only)
Kill 50 enemies with grenades. (campaign only)
Get out of here!
Kill 350 enemies with any rifle. (campaign only)
Stand united.
Kill 250 enemies with headshots. (campaign only)
Kill 75 enemies with any shotgun. (campaign only)
Kill 50 enemies with any sniper rifle. (campaign only)
Show mercy.
Blow up 10 explosive objects, killing at least one enemy each time. (campaign only)
Kill an Edged Weapon Expert while he is up to 5 meters away. (campaign only)
Stun an enemy by dumping sand on their head. (campaign only)
Recover 12 Intel Items.
Kill an enemy by tagging him with a sticky grenade. (campaign only)
Kill an enemy just as they are throwing a grenade. (campaign only)
Hit 10 enemies with your melee attack. (campaign only)
Buck the chain of command.
Kick an enemy by vaulting over a cover. (campaign only)
Play it loose.
Kill 50 enemies using only the Attack Command. (campaign only)
Face the horrors of war.
Kill 3 enemies with a single grenade. (campaign only)
Sprint into cover 10 times while under fire. (campaign only)
Engineer an exit strategy.
Kill 4 enemies with a shotgun in 10 seconds or less. (campaign only)
Kill 5 enemies using blind fire. (campaign only)
We have contact.
Look out below.
What's lost is found.
Recover one Intel Item.
Kill an oryx. (campaign only)
Unlock all Trophies.
Complete game on "FUBAR" difficulty.