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