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It's a Knackout Cleared all chapters on the Hard difficulty level or higher.

Lightning Dancer Dodge 200 lightning strikes and obtain the reward

Green Teen Finish Shadows of Rose on at least Casual difficulty.

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

That Old Familiar Feeling Clear The Hallway Of Lasers

Concordance Officer Collect all Trophies.

Ultimate Warrior Reach rank 20 with all roles.

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

Road Block Block an incoming projectile with a Blue Cube.

Combat Hardened Complete the Campaign on Veteran or Realism difficulty.

Not even a dent Complete a level with a custom made ship, without dying

Wrecking Machine Destroy 40 vehicles in the single player Campaign.

A TASTE FOR IT Get your first kill

Eddie Is Back Complete Eddie's Challenge

Accomplished Clear all missions (including Side Ops and Extra Ops)

It's Chilly in Here Break both elevator window panes.

Speed King Achieved five-star ranks in all Time Attack stages

The Golden Ticket You made a tough decision as to whether Irenka Bauer or Edward Brod would get to stay in Prague.

Tick Tock You found the 10 hidden alarm clocks.

Pyramid Parkour Use all of Papu's Pyramid's shortcuts in the same race.

Cursed No More Purify a Cursed piece of gear.

Crystal Relic Master Unlocked all upgraded Knack characters

Go Gentle Into That Good Light Make it through the approach to the lighthouse without firing a weapon.

Ready for Armageddon Upgrade all weapons to level 3. (Campaign)

Sisters of Athena Endurance Co-op Challenge: Kill a combined total of 25 enemies in a single Expedition

With Practiced Bravado 100 Kills During Shootdodge

Sisters of Artemis Endurance Co-op Challenge: Kill a combined total of 10 dangerous animals in a single Expedition

Old-Schooled Beat Mr. and Ms. Y.

Like lightning Use the Boost for a total of 30 minutes.

Calling It In Get 50 kills with lethal Scorestreaks in Multiplayer.

Wacky Taxi Use 10 Stunt Ramps in a taxi with a passenger

Building Model Citizens Play with all 8 disguise slots customised at the same time

Combo Expert Achieve an "Amazing!!" combo.

Mad Scientist Awarded for alchemizing 120 different items.

Intergalactic Dance Party Get at least 1 of every enemy in the game to dance by using the Groovitron. (Any Mode)

Samizdat You opted to work with the Samizdat group & spread their news throughout Picus media streams.

Undertaker In The Final Reich, kill the Bomber with the shovel.

Diamond Medal Defeated all bosses using Diamond Knack

Guardian Do not allow any friendly armor to be destroyed during Act 3-5.

We Will Survive Win 15 matches in Team Survivors.

Depth Clear the "Eliminate the Renegade Threat" Side Op by extracting both targets

Mr Gold Collect 4,000,000,000 LEGO studs

Alchemist Directly hit an opponent with a thrown Beaker Power-Up.

Gasoline Cowboy Rescue your allies with the Sherman while keeping your armor above 80% in Collateral Damage.

Wizardry Whiz Awarded for becoming a master magician.
Congratulations! You truly are a whiz at wizardry!

A Night at the Mansion Get 8 transmorphed bunnies to dance on screen at once.

Dockyard Discord Finish the Connection level in "Joe's Adventures."

Outsmarted In singleplayer, get a quadruple kill with a single Frag Grenade

Campaign Silver Obtain 72 medals on the original Arkham City campaigns (as Batman)

Quantity Over Quality Level up 5 characters! Up to level 5 should do the trick. When it comes to food and fightin', it's quantity over quality, mate.