GTAkiller

Playin' Hooky Use the Pirate hook on 5 unique ziplines.

Rest Your Weary Fists Kill the Dark Lord (Ancient Gods 2)

Team Ellie Complete all Ellie faction challenge tracks
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Team Abby Complete all Abby faction challenge tracks
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A New Protagonist Earned the top ranking in the Friendly Match.

Short Stack Find the mysterious visitor in the cliffs of Repugia.

Occasio Calva Complete Kairos Gate.

Seal the Deal Complete a Triumph Seal.

You have your moments Get 5000 Objective Score while playing as any Hero (Multiplayer)

Jeepers Peepers Acquire the Eyeball Costume.

Birdbrain Beatdown Defeat Araxia in battle.

Revolutionary Hero Complete all quests in Repugia.

Collector Acquire all items available in normal time attack

Critical Literature Collect all physical Codex pages in a single save slot (Ancient Gods 2)

I'm dead serious Threw a chaff grenade at ZEKE (single player only).

Pursuit of Knowledge Filled 80% of the Datalog.

You Died Alot Get killed by Jason 100 times.

Campaign Kitty Obtain all 108 medals on the original Arkham City campaigns (as Catwoman)

Let's Play Complete the first Horde Mode Mission

New Superpower Complete all China Rising Assignments

Apprentice! Complete 5 tutorials

Wishing for the Best Complete the "Last Wish" Raid.

I Got This In The Darkest Shore, survive the initial beach rush without using any machine gun turrets.

I came in like a Resogun Accumulate a total Wrecking combo of 1,000 in Demolition mode

Don't make me pull the trigger! Survive for 5 minutes in Demolition mode

Street Fighter Complete all Dragon's Teeth Assignments

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

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

Call me Terror-Billy! Beat the game on "Call me Terror-Billy!" difficulty or higher

Tier One In a group of 4 finish an Operation on Challenge with 5 directives enabled.

Burning times Complete a level on Master difficulty without using bombs, overdrive or boost with a custom ship

Wander and the Forbidden Clear the game in hard difficulty

Monster Hunter Cleared all hunting quests.

Endangered Lizards Killed all shining lizards

Steel Eater Defeated all AI weapons.

Muppet Mastery Complete The Muppet pack's story

MAIN OPS All Rank A Cleared all MAIN OPS missions at Rank A or higher.

Climber Reached top of the shrine

1-Upsmanship Complete Extra Life Mode with 5 Extra Lives in your Inventory (Ancient Gods 1)

You know how I said I'll kill you last? Throw Satan off a cliff as Brommando

Kaz Mania Obtained Rank S on a date with Kaz.

Going Up… In The Darkest Shore, unlock the Ubersprengen.

King in the North Complete all Final Stand Assignments

Campaign Nightwing Obtain 114 medals on the original Arkham City and Nightwing Bundle Pack campaigns (as Nightwing)

Campaign Wonder Obtain 114 medals on the original Arkham City and Robin Bundle Pack campaigns (as Robin)

Hot Brotato Kill a terrorist with a returned grenade

Mighty Wander Max out stamina bar

Hard Headed Collect 1000 helmets

Rare and Exceptional Purchase Armor, a Charm, or Vanity Gear from Masujiro the Melodious in New Game+.

Big Top! Achieve a score of 2500 or higher in "Gonzo's Endless Cannon Run Ride!"