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