Here is the full list of all 49 LEFT ALIVE trophies - there are 35 bronze, 11 silver, 2 gold and 1 platinum.
Finished Chapter 4.
Finished Chapter 3.
Defeated an enemy Wanzer.
Piloted a normally functioning Wanzer for the first time.
Defeated fifty enemies using either a metal pipe, shovel, or sledge hammer.
Finished Chapter 2.
Guided a survivor to an evacuation shelter for the first time.
Hit ten enemies with melee attacks from behind.
Finished Chapter 1.
Received Aleksandr's bill for his meal at Paradise Burger.
Defeated twenty enemies in a single Wanzer without disembarking.
Crafted a gadget.
Collected all trophies.
Finished Chapter 5.
Finished Chapter 6.
Finished Chapter 7.
Finished Chapter 8.
Finished Chapter 9.
Finished Chapter 10.
Finished Chapter 11.
Finished Chapter 12.
Finished Chapter 13.
Finished Chapter 14.
Rescued ten survivors.
Rescued twenty survivors.
Rescued all of the survivors.
Stopped the massacre of civilians.
Got repeatedly tricked by a suspicious woman at the harbor apartments.
Placed two groups of men and women who don't get along in the same shelter.
Finished the game for the first time.
Finished the game on Advanced difficulty.
Finished the game on Hopeless difficulty.
Obtained the best ending for all three protagonists.
Obtained the worst ending for all three protagonists.
Acquired all three types of backpacks for each protagonist.
Collected all database information, excluding TUTORIALS and COLLABORATION.
Used every gadget at least once with any protagonist.
Defeated one hundred enemies using offensive gadgets.
Made fifty enemy soldiers bleed to death.
Disabled four enemy drones simultaneously with one EMP grenade or EX EMP grenade.
Set five or more enemy soldiers on fire simultaneously.
Put out a fire on yourself with an extinguisher.
Defeated an enemy Wanzer on foot.
Defeated ten enemy Wanzers on foot.
Completed a close-quarters combo on a staggered enemy mech when piloting a Wanzer.
Discarded all weapons on a Wanzer and used only its bare hands to defeat an enemy Wanzer.
Accumulated the maximum amount of ammunition for five firearm types.
Possessed at least one handgun, assault rifle, shotgun, submachine gun, and magnum at the same time.
Used either a metal pipe, shovel, or sledge hammer to finish off an enemy Wanzer.