UnexpectedGerman

Aerial Assassin In the Main Campaign, killed 20 enemies with a Sky-Line Strike.

Head Over Here Collect 250 Metal Head Skull Gems

Maximum Stopping Power Upgrade one weapon to the max.

Betrayed Complete 'All Hands On Deck'.

Careful, He Bites Killed 15 enemies with the Hunter's action skill

Poodle Skirt Complete 'Hello Teacup'.

Made in New Haven Completed all missions in the Rust Commons

On Rails Experience Choo Choo!

Can't We Get BEYOND Thunderdome? Emerged victorious from an arena match

< Make/Unmake > Use Shape and Fracture a combined total of 100 times
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Set 'em Up, Knock 'em Down Defeat 15 Staggered enemies with a Charged Shot.
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Curiosity Killed the Cat Completed Episode 10.

Tomb Raider Complete all Challenge Tombs

Quench Their Thirst Give water to a wanderer

Paying Respects Attend a funeral

Keymaster Complete 'Batteries Not Included'.

Thick Skin Completed Episode 11.

The Hunger Bio Leech 100 enemies.

Ding! Sleepless Earned level 40

Master Ninja Complete any level using only the knife to kill enemies.

Break the Bank Guess it was time to cash out.

Hide And Seek A deadly game of hide and seek

No Guts, No Glory Perform a 2.5 second or longer swan dive

Bombardier Collect the formulae for 6 different bomb types.

Machine Man Do everything you can for CID -- Quests and... everything.

Imperator Complete 'Grand Finale'.

One Slick Super-spy Use only the EMF Visualizer to complete Ada's gameplay segment.

Trick Shot Shoot a bottle out of the air

Reckless Abandon Killed 15 enemies with the Berserker's action skill

Bird on the Ground Shoot down an enemy helicopter with an RPG in the single player campaign.

The Escape Complete 'Hunted' and 'Death From Above' on Veteran difficulty.

You're on a boat! I bet you never thought you'd be here

Master Fletcher Craft 25 of each special arrow type (Fire, Grenade, Poison)

The Bog Complete 'The Bog' and 'War Pig' on Veteran difficulty.

Crack The E Nigma Solve every riddle on the island

Paranormal Bromance Do everything you can for Matt -- Quests, Loyalty Missions... everything.

The First Horseman Complete 'Shock and Awe' on Veteran difficulty.

Weapon Proficiency Over the course of the game, you've scored 100 perfect attacks.

Lore Hoarder Collect 65 % of all Galactic Compendium entries of each category.

Plastic Prison Breakers They had no way out.

Rotisserie Shoot a chicken out of the air with a fire arrow

Look Out Below Completed Episode 12.

Get Off My Cloud Get 100 High Fall take downs.

World's Greatest Detective Spirit of Amadeus Arkham revealed

Desert Storm Find the Desert Eagle in 'Crew Expendable' and kill 5 enemies with it.

Industrial Accident In the Main Campaign, killed 20 enemies with a Sky-Hook Execution.

New Kid On The Block You have joined the KKK.

Kids Just Don't Understand Completed Episode 13.

It Took Two You did it! CO-LLA-BO-RATION!

The Full Kinzie Do everything you can for Kinzie -- Quests, Loyalty Missions... everything.