Here is the full list of all 50 Injustice: Gods Among Us Ultimate Edition achievements.
Complete All S.T.A.R. Lab Missions with 3 Stars
Beat All S.T.A.R. Lab Missions (Excluding DLC)
Reach Level 100
Perform every Meter Burn special move of every character
Perform every special move of every character
Perform every level interaction once
Knock opponent through all transitions across all levels
Complete Classic Battle with all characters
Perform a 10 hit combo with every character
Perform every character's supermove
Complete Battle Mode
Get 100 Stars in S.T.A.R. Lab Mode
Complete Classic Battle with any character
Cause maximum damage in all Arenas (does not include Practice mode)
Play 200 complete Online Matches
Win 100 complete Online Matches
Vote Correctly in a KOTH match
Win 10 complete Ranked matches
Dethrone the King in an online match
Defeat a Survivor
Enter Online Practice with someone on your friends list
Win a single online match
Win 1 complete Ranked match
Unlock everything in the Archives
Win a Clash sequence with any character
Complete 100% of Story Mode
Win all story mode minigames
Complete 50% of Story Mode
Get 3 stars on 1 S.T.A.R. Lab Mission
Complete 1 S.T.A.R. Lab Mission
Defeat every Villain With Batman
Make a comeback when at low health (10% or less)
Win with Batman using every special move and his Supermove
Unlock a costume in the Archives
Unlock All costumes in the Archives
Equip a new Background Image
Reach Level 10
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
Use every interactable and win in a multiplayer match
Win a multiplayer match with a timeout
Win a match with the super move of any character
Knock an opponent through a transition
Equip a new Icon
Perform 8 throws and win in a multiplayer match
Complete Tutorial
Enter Practice Mode
Equip a new Character Portrait
View Your Hero Card