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