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