Here is the full list of all 51 Injustice: Gods Among Us Ultimate Edition trophies - there are 38 bronze, 10 silver, 2 gold and 1 platinum.
You've unlocked all Trophies!
Complete Battle Mode
Reach Level 100
Play 200 complete Online Matches
Unlock everything in the Archives
Perform every level interaction once
Perform every Meter Burn special move of every character
Perform every special move of every character
Perform a 10 hit combo with every character
Defeat every Villain With Batman
Complete Classic Battle with all characters
Complete All S.T.A.R. Lab Missions with 3 Stars
Beat All S.T.A.R. Lab Missions (Excluding DLC)
Perform every character's supermove
Vote Correctly in a KOTH match
Win 100 complete Online Matches
Get 100 Stars in S.T.A.R. Lab Mode
Unlock a costume in the Archives
Unlock All costumes in the Archives
Get 3 stars on 1 S.T.A.R. Lab Mission
Complete 1 S.T.A.R. Lab Mission
Knock opponent through all transitions across all levels
Defeat a Survivor
Dethrone the King in an online match
Use every interactable and win in a multiplayer match
Win a match with Green Arrow using only arrows
Win a match as Deathstroke without missing a shot (minimum 12 shots)
Send an opponent through all three Metropolis transitions in one fight
Win with Batman using every special move and his Supermove
Perform 8 throws and win in a multiplayer match
Enter Online Practice with someone on your friends list
Make a comeback when at low health (10% or less)
Equip a new Icon
Equip a new Character Portrait
Equip a new Background Image
Win 10 complete Ranked matches
View Your Hero Card
Win 1 complete Ranked match
Win a multiplayer match with a timeout
Win a single online match
Cause maximum damage in all Arenas (does not include Practice mode)
Complete Classic Battle with any character
Complete 100% of Story Mode
Win all story mode minigames
Win a match with the super move of any character
Complete 50% of Story Mode
Reach Level 10
Win a Clash sequence with any character
Knock an opponent through a transition
Enter Practice Mode
Complete Tutorial