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