Here is the full list of all 40 Attack on Titan 2 trophies - there are 20 bronze, 16 silver, 3 gold and 1 platinum.
Acquired all trophies.
Reached 100% gallery completion in Attack on Titan 2 / A.O.T. 2.
Leveled all characters to max friendship in Attack on Titan 2 / A.O.T. 2.
Completed all Story Mode Dire Eliminations.
Leveled one character to max rank in Attack on Titan 2 / A.O.T. 2.
Completed all Scout Missions in Attack on Titan 2 / A.O.T. 2.
Unlocked all characters in Attack on Titan 2 / A.O.T. 2.
Completed your first Dire Elimination.
Achieved a Battle Rating of S in all Story Mode episodes.
Completed the final chapter in Story Mode.
Completed Story Mode Chapter 5.
Completed Story Mode Chapter 4.
Leveled the protagonist to max level in Attack on Titan 2 / A.O.T. 2.
Saved 100 or more comrades.
Completed Story Mode Chapter 3.
Used 1,000 Wings of Freedom.
Leveled one character to max friendship in Attack on Titan 2 / A.O.T. 2.
Completed 50% or more of the Scout Missions in Attack on Titan 2 / A.O.T. 2.
Maxed out all training levels in Attack on Titan 2 / A.O.T. 2.
Reached 50% gallery completion in Attack on Titan 2 / A.O.T. 2.
Avoided 100 Titan attacks.
Got 2,000 total body part destructions.
Sent 50 gifts.
Maxed out the Titan Research Room level in Attack on Titan 2 / A.O.T. 2.
Completed Story Mode Chapter 2.
Had over 100 allies die.
Eliminated a total of 1,000 enemies.
Completed 25% or more of the Scout Missions in Attack on Titan 2 / A.O.T. 2.
Completed 100 Side Missions.
Used more than 100,000 Regiment Funds in total.
Built 100 bases in battle.
Had over 100 allies join.
Reached 25% gallery completion in Attack on Titan 2 / A.O.T. 2.
Completed Story Mode Chapter 1.
Eliminated a Titan with the Hook Drive.
Successfully completed a Sneak Attack.
Increased friendship rank.
Used a Buddy Action.
Achieved a Battle Rating of S in any episode.
Got selected as the top performer during training in Episode 1 of the Story Mode prologue.