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