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