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