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Prime Directive Shatter Skeletron Prime.

Ultimate Collector Find all treasure.

Acquire Waffle Weapons! Obtain the Ray Gun, DG-2, and the Monkey Bomb at the same time in a game. (Map Pack 3 only)

ARCHIVIST Collect all documents

The First One is the Hardest Get your first 1,000,000+ combo

Chapter 6 Speedrun Complete a Speedrun of Chapter 6 below the target time.

Nightwing Revenge Obtain 78 medals on the original Arkham City and Nightwing Bundle Pack ranked maps (as Nightwing)

Tournament of Power Top Dog Achieved victory in the Tournament of Power.

Bloody Millionaire Accumulate a total of 1 million blood points. (blood points can be spent before reaching the total)
543308/1000000

Bird Brained Brainbug at least one penguin from each of the 7 penguin ranks, including Putzki in a single playthrough

Robin Revenge Obtain 78 medals on the original Arkham City and Robin Bundle Pack ranked maps (as Robin)

Mind Your Own Business... Completed Vegeta's Saga.

Classic Leaderboard Champ Ever try the Ranking Challenge at the Game Center? Give it a shot! It's important to always challenge yourself, even when it comes to games.

Flyswatter Destroy all helicopters in the "Vertigo" Special Ops mission.

Orb of Delusion Obtain the Orb of Delusion artifact.

Real Estate Agent Have all possible town NPCs living in your world.

The Boss Beats A Boss Defeat a boss using only President of Sony Computer Entertainment Worldwide Studios Shuhei Yoshida

Bookwyrm This is proof that you've become quite familiar with the Library. How to obtain this is kind of a secret, but if you take the time to do a bit of reading now and then, you should be pleasantly surprised.

The epitome of Super Earth Complete all Trophies.

Pushing the Limit Completed the "Pushing the Limit" chapter of Goku's Saga.

The Ultimate Sacrifice In Zetsubou No Shima, retrieve the Skull of Nan Sapwe.

Chapter 5 Speedrun Complete a Speedrun of Chapter 5 below the target time.

Crystal Clasp Obtain the Crystal Clasp artifact.

Make Friends Acquire all six main characters.

Pinnacle Complete the "Vertigo" Special Ops mission on Veteran difficulty.

Prince of the Screen Reach King of the Screen level 3

Chapter 7 Speedrun Complete a Speedrun of Chapter 7 below the target time.

Supernova Get 3 stars on each of the first 14 Echoes

Chatterbox Sometimes, after you've found a discovery point or when you're at a save point, you have the opportunity to press L3 to initiate a conversation between your companions. This is proof that you've experienced many Things and had a lot of Opinions about them.

Bloody Lust Kill Isaac with Samson

Chapter 8 Speedrun Complete a Speedrun of Chapter 8 below the target time.

Joining the Pack A lone wolf is strong, but they're far more fearsome if they have a pack to call their own. So go on—try making some friends!

Deadhead Get 150 zombie headshots in a single game. (Map Pack 2 only)

Dirty Half-Dozen Complete the Cooperative game mode

To Jugger or to Jugger-Naut Kill all juggernauts after they land on Veteran difficulty in the "Vertigo" Special Ops mission.

Golden Idol Perform every Single Player Skillshot in the game

Test Subjects Use sheep as test subjects in 6 levels

Mercy Kill 5 enemies while they are on fire in Chapter 3: Fire Sale

Greed Gem Play Stone Mask cards 10 times.

Land Baron Get five islands on your DigiFarm.

Rock, Paper, Plasma In Voyage of Despair, kill 9 zombies via Catalytic Detonations in a single game

Positive cash flow Complete a Financial objective in Career Mode

A Blank Card Kill Isaac with Eden

Reaper Defeated the Harvester ("The Golems of Amgarrak" downloadable content)

YOU > Evil...Caves Conquer all Caves of Evil
with Kisuke and Momohime.

Wander and the Forbidden Clear the game in hard difficulty

Blue Lagoon Clean Sweep Complete all Sector Challenges in Blue Lagoon.

Straw Purchase Gift a Mystery Box Wonder Weapon to a teammate and have them accept it

Old School Play a 2,3,4 player split screen local game

Catalog Conqueror STU: Complete all nekomata jobs in "The Spider's Thread" mode.