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