DC Universe character cameos...
	Original Doomsday costume...
	Various Steam Achievements...

The following is a list of the non-playable DC Universe characters in the game.

Abin Sur (Green Lanter victory pose)
Athena (Themyscira stage)
Atom Smasher (Hall Of Justice stage)
Atrocitus (Metropolis stage)
Ch'p (Green Lanter victory pose)
Darkseid (Hall Of Justice stage)
Deadshot (Stryker's Island stage)
Giganta (Hall Of Justice stage)
Gorilla Grodd (Stryker's Island stage)
Guy Gardner (Green Lanter victory pose)
Hammeroon (Green Lanter victory pose)
Hugo Strange (Arkham Asylum stage)
John Stewart (Green Lanter victory pose)
Katma Tui (Green Lanter victory pose)
Killer Croc (Arkham Asylum stage)
Kilowog (Metropolis stage)
Martian Manhunter (Watchtower stage)
Metallo (Stryker's Island stage)
Parasite (Stryker's Island stage)
Penguin (Arkham Asylum stage)
Salaak (Green Lanter victory pose)
Scarecrow (Arkham Asylum stage)
Starro (Fortress Of Solitude stage)
Stel (Green Lanter victory pose)
The Atom (Hall Of Justice stage)
The Riddler (Arkham Asylum stage)
Tomar Re (Green Lanter victory pose)
Trigon (S.T.A.R. Labs opponent)
Two-Face (Arkham Asylum stage)

Fight in the Fortress Of Solitude arena with two characters playing as Doomsday, with one person wearing the Insurgency costume and the other wearing the default costume. The Doomsday appearing at the back of the level will now be wearing the costume from Death Of Superman.

Complete the indicated task to unlock the achievement.

Achievement	How to unlock
All Star	Get 100 Stars in S.T.A.R. Lab Mode.
Almost There	Complete 50% of Story Mode.
Arkham City Lockdown	Defeat every Villain With Batman.
Around and Around We Go	Perform every level interaction once.
Around The World	Knock opponent through all transitions across all levels.
Beginner's Luck!	Win a single online match.
Breaking Records	Win 100 complete Online Matches.
Buddy System	Enter Online Practice with someone on your friends list.
Bull in a China Shop	Cause maximum damage in all Arenas (does not include Practice mode).
Cosplay	Unlock a costume in the Archives.
Feel the Burn!	Perform every Meter Burn special move of every character.
FINISHED	Win a match with the super move of any character.
Go Sit in the Corner	Win a multiplayer match with a timeout.
Gonna Need More Closet Space	Unlock All costumes in the Archives.
Groundbreaking	Use every interactable and win in a multiplayer match.
Heavy Hitter	Perform a 10 hit combo with every character.
Hoarder	Unlock everything in the Archives.
Holy Knockout Batman!	Win 10 complete Ranked matches.
I Can Back it Up	Equip a new Background Image.
I Conquered All	Beat All S.T.A.R. Lab Missions (Excluding DLC).
I Voted!	Vote Correctly in a KOTH match.
Iconic Representation	Equip a new Icon.
It Has Begun	Complete 1 S.T.A.R. Lab Mission.
Justice for All	Complete 100% of Story Mode.
Learning is Fun	Complete Tutorial.
Looking Good!	Equip a new Character Portrait.
Lucky Break	Win 1 complete Ranked match.
Metahuman	Perform every special move of every character.
Mini-Master	Win all story mode minigames.
Only a Real Master	Make a comeback when at low health (10% or less).
Over The Top!	Play 200 complete Online Matches.
Overachiever	Get 3 stars on 1 S.T.A.R. Lab Mission.
Overthrown	Dethrone the King in an online match.
Perfect Aim	Win a match as Deathstroke without missing a shot (minimum 12 shots).
Practice Makes Perfect	Enter Practice Mode.
Rise to the Top	Complete Classic Battle with any character.
Sidekick	Reach Level 10.
Statistical Advantage	View Your Hero Card.
Streak Ender	Defeat a Survivor.
Superhuman!	Perform every character's supermove.
The Caped Crusader	Win with Batman using every special move and his Supermove.
The Hero We Deserve	Reach Level 100.
Throwdown!	Perform 8 throws and win in a multiplayer match.
Top Rung	Complete Classic Battle with all characters.
Tourist	Send an opponent through all three Metropolis transitions in one fight.
True Marksman	Win a match with Green Arrow using only arrows.
Ultimate Battler	Complete Battle Mode.
Unstoppable Force	Win a Clash sequence with any character.
World's Finest	Complete All S.T.A.R. Lab Missions with 3 Stars.
Wrecking Ball	Knock an opponent through a transition.