| Achievement | How to unlock
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|---|
| A Death in the Family (30 points) | Finish the game.
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| Art Preservation Society (15 points) | Don’t break any Statue in the Museum Stage during "A Hostage Crisis".
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| Busted Block (20 points) | Defeat Blockbuster.
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| Cold War (20 points) | Defeat Killer Frost.
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| Daddy's Little Girl (20 points) | Defeat Cheshire.
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| Hide and Seek (15 points) | Don't activate the Statues in The Warrior's Path Stage during "Tag Team".
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| Hurry Up! (15 points) | Escape the Avalanche Stage during "Go with the Flow" in less than 5 minutes.
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| It’s a trap! (15 points) | Avoid damage from the spike trap in Atabey's Temple Stage during "The Goddess Shrine".
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| Match Day (20 points) | Defeat Sportmaster.
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| One with the Shadows (15 points) | Don't be spotted by any searchlight in Gotham Docks Warehouse stage during Hometown.
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| Riddle me this! (20 points) | Defeat The Riddler.
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| Secrets from the Deep (20 points) | Defeat Black Manta.
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| Tag Team (20 points) | Defeat Icicle Jr and Sportmaster.
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| Twisted Mind (20 points) | Defeat Psimon.
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| Welcome to la jungla (20 points) | Defeat Bane.
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| Achievement | How to unlock
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|---|
| Apple of Black Canary’s eye (30 points) | Get all A Grades in YJ Challenges.
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| Black Canary sales! (15 points) | Buy half of the enhancements.
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| Challenge Master (15 points) | Get 50% A Grades in YJ Challenges.
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| Collection (25 points) | Get all the Dioramas.
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| Graduate with Honors (40 points) | Obtain A Grades in all Missions.
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| Hitting Henchmen (10 points) | Defeat 200 enemies.
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| Induction Party (30 points) | Unlock all characters.
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| Justice Allies (25 points) | Complete 5 missions co-op mode.
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| Justice League Member (40 points) | Reach level 40.
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| Justice Partners (10 points) | Complete 1 mission co-op mode.
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| Justice Team (35 points) | Complete 10 missions co-op mode.
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| Ka-Pow! (5 points) | Defeat the first 15 enemies.
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| Legacy (80 points) | Complete the game on Hard Difficulty.
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| Maneuver 7! (10 points) | Activate Squad Boost 20 times.
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| Mardi Gras (20 points) | Collect all the Alternate Costumes.
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| No Match, not even in Cadmus (30 points) | Complete all challenges.
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| No room in Belle Reve (20 points) | Defeat 500 enemies.
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| Out of stock (35 points) | Buy all enhancements.
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| Ready for Spring Break (10 points) | Obtain A Grades in half of the Missions.
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| Sidekick (10 points) | Reach level 10.
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| Souvenir! (15 points) | Get half the Dioramas.
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| Srewoprepus! (10 points) | Use all the powers of the heroes.
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| Staying Whelmed (15 points) | Complete half of the challenges.
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| Sunday Best (10 points) | Collect half of the Alternate Costumes.
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| Superhero (20 points) | Reach level 20.
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| The Quest for Roy Harper (20 points) | Get all Red Arrow Journals.
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| Training Room (10 points) | Complete 1 challenge.
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| Trivia Apprentice (10 points) | Reach a Score of 500 in the Young Justice Trivia.
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| Trivia Expert (20 points) | Reach a Score of 1000 in the Young Justice Trivia.
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| Trivia Master (30 points) | Reach a Score of 5000 in the Young Justice Trivia.
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| United We Stand (45 points) | Complete all missions in co-op mode.
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| Who's going to pay for that? (10 points) | Destroy 350 objects.
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| Winning Streak (5 points) | Answer 5 Young Justice Trivia questions correctly in a row.
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