HappyYAYS

Kamikaze Complete a level on Regular difficulty or higher using only melee or grenades. (Solo only)

Hardened Hedgehog Raised Defense Level to MAX.

Ultima Weapon Synthesize the Ultima Weapon.

Stick it to the enemy Survive 15 consecutive waves using the analog combat controls.

Chaos Island Memories Repaired all Portals on Chaos Island.

Combo Crackerjack Performed Phantom Rush 50 times, outside of the training simulator.

It's a trap! Score a combo of 75 or more while fighting up the stairs at the "Front Gates of EEEEEEEVIL!"

Hypersonic Hedgehog Raised Speed Level to MAX.

Close Shave Complete all Under the Bridge and Knife Flight challenges.

Datascraper Get an A rank on both Flash Tracer courses.

Chaos Island Explorer Completed all Challenges on Chaos Island and fully revealed the map.

Cleaned The Mean Streets You caught 20 criminals through the police computer.

Hearty Hedgehog Raised Ring Level to MAX.

Master Chef Earn an "Excellent" while preparing every type of cuisine.

Pulling His Strings Defeat the Dollmaker without taking any damage.

Gold rush Complete five Gold Challenges

Chaos Island Expert Viewed all Side Stories on Chaos Island.

Ouranos Island Explorer Completed all Challenges on Ouranos Island and fully revealed the map.

Ouranos Island Memories Repaired all Portals on Ouranos Island.

Easy Prey Defeated all enemy types.

The Beginning of the End In Shadows of Evil, complete all Rituals.

"And Mash wins!" Survive the Festival as Mash.

Map Maker You've uncovered more than 80% of the Mini-Map!

Shot in the Dark Kill 10 enemies while the lights are out in the subway in 'Eviction'.

Painting the Town Red Complete all Radula Rooms

Architect Complete 'Vendetta' on Veteran difficulty. (Solo only)

Ouranos Island Expert Viewed all Side Stories on Ouranos Island.

Complete a set During a single round kill an Infected, Suicider, Ram, Butcher, Floater, Walker.

Expert Historian Viewed all Side Stories.

Perfect Run Complete a level without getting hit

Impossible Rescue Rescued the Bot in Megamix Mastery.

Bringing the Pain Defeat 50 players using physical attacks in Versus.

Threats Identified Defeated all guardian types.

Time Attacker Complete any time trial challenge.

You Monster Reunite with GLaDOS

Doctor Fate-Ality Perform 3 background bounces on the Empire Theatre background

Squad Goals Score a Goal while in a Club Match (Online Matchmaking only)

Chain Reaction You exploded 10 vehicles in 10 seconds.

The Last Laugh The joke's on who?

Veteran Pilot Clear gummi ship mission 2.

Know DP? Know madness Complete the game on Ultra-Violence! difficulty

Family Memories Fond and Faded Find all Liddell Memories

Trophies Completed! Collected all trophies.

Cold Fusion Unlock Hidden Fighter "Cyber Sub-Zero"

Career Criminal Attain 100% Game Completion.

Seasoned Campaigner Pepper All Snouts in the Game

Everything Fit to Remember Find all Memories

Undiscouraged Complete the first Thermal Discouragement Beam test

Twice Nightly Complete New Game Plus

Silver Revenge Obtain 48 medals on the original Arkham City ranked maps (as Batman)