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Now that is what I would call a multi-kill! Kill 7 enemies within a very short time using only your primary weapon.

Goromi the Hostess Met the mysterious lady, Goromi.

All Fire-Chain Skills Acquired Acquired all of Velvet's Psypher skills.

Bazillionaire You earned over 10,000,000G total.

A Feast for Two Endurance Co-op Challenge: Eat the meat of 3 bears with your partner

Farewell, Tien... Complete seven or more quest tutorials.

Gold Revenge Obtain all 72 medals on the original Arkham City ranked maps (as Batman)

Passion for Fashion Obtain all costumes.

Perfect Freeflow 2.0 Perform a perfect combo including all of Batman's combat moves (any play mode)

All Abilities Acquired Acquired all abilities with any of the characters.

Shutout Win a Control map without the enemy capturing an objective in Quick or Competitive Play.

Sound the horn on a Silver Lake Super Jump in the Cavalry Bootlegger Awarded for sounding the horn and successfully landing a Super Jump in Silver Lake driving the Cavalry Bootlegger

Synthesis Amateur Synthesize 15 types of items.

Reroll 5 Reach Level 80 with Sir Ambrojoe.

Starsenal Obtain all weapons (must load grenade launcher with all shell types).

Flame Dancer Obtained all Master Arts for Panther.

Lunar Vortex Grabbed 5 enemies with one Lunar Style Vortex Field.

Good One, Babe Watch Deathtrap kill 50 enemies.
0/50

Had Enough of Preachers Defeat Osmund Saddler in Separate Ways.

Remember The Fallen Collect All Fallen Striders

Majima From Below Assaulted by Majima from a manhole.

Persuasive Succeeded at five difficult Persuasion attempts

The Team That Slays Together... Win 15 matches in Team Slayers.

Mix Master Play a Custom Speedlist you have created (Multiplayer)

Break it Down! Breaker Majima forced his way into a fight.

Technological Marvel Obtained all Master Arts for Sophie.

Earth To Earth Swamp Thing must defeat Poison Ivy with the final hit coming from Green Kingdom

Item Sweeper Obtained a total 200 items from the Jails.

The Flames Make It Go Faster Activate the Blazing Steed.

Cage of Gluttony Torched Completed the Sapporo Jail.

Spicy Boy Defeat Haderax the Invincible.

That Old Familiar Feeling Clear The Hallway Of Lasers

Great Haul Endurance Challenge: Escape the forest after surviving 10 days, with at least 10 Relics

No Photographs, Please! Killed 10 SpyBugs before they took your photo.

Tinkerer Crafted an item

Ultimate Warrior Reach rank 20 with all roles.

Flawless Execution Complete all rescue missions with zero errors

Deus Ex Machina Experience all the different endings that Deus Ex: Human Revolution - Director's Cut has to offer.

Master of Body and Soul Obtained all Soul, Technique, and Body abilities.

Hurry the #@$% Up! Destroy five or more enemy transports from atop the Kreon in Act 3-7.

Go Pro or Go Home Unlock all the Pro mods on a car (Single Player)

First Aid Use your Healing Potion 1,000 times.
0/100

Road Block Block an incoming projectile with a Blue Cube.

Gentleman Thief Obtained all Master Arts for Mona.

Dark Future Perform 50 Brutalities

Road of Erion Completed the Churning Rift of the World.

Cage of Desolation Condemned Completed the Okinawa Jail.

The Cloaked Shadow Defeat the Phantom at the Clock Tower.

Half the Battle Completed 50% of the Completion List.

ADAM Addict Resolve all the Little Sisters in Minerva's Den