Cozmogramma

Took this thing on a test flight Complete Arcade mode with a custom made ship, at Veteran difficulty level

Ancient Marrakesh Reach Marrakesh Mastery Level 20.

Horsepower Completionist Gain all stars in 'Horsepower'.

Greatest Tag-Team in History Defeat both Lightning Skeleton arenas in The Great Temple on Hard Mode, with 2 or more players (or as Javier Jaguar)

I never doubted you! Win 10 Rounds of Infiltration

Isaac's Tears Kill Isaac with Isaac

Sapienza Escalated Complete Level 5 of an Escalation Contract set in Sapienza.

dr0n3d Complete the "Arctic Recon" Special Ops mission in under 3:30.

Art collector Knock out 10 enemies with a painting of Sir Francis!

Miami Wise Reach Miami Mastery Level 20.

Public Relations Complete a Brand Exposure objective in Career Mode

High Roller Complete the "Iron Clad" Special Ops mission on Veteran difficulty.

Soup Sandwich Ram Rose and Parvati, make Berg blow himself up and drown Graves.

Shovel Economy Finish a level and swing the Shovel Blade fewer than 20 times.

Working Vice Shoot 10 stacks of cocaine in ‘Hostile Takeover’ Operation.

Perk-a-Holic Have all four perks simultaneously active in a game of Nazi Zombies. (Map Pack 2 only)

Easy Rider Finish all the SIDECAR challenges!

Gambler Play Slots 100 times.
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Skilled Adversary In IX have a Challenge banner with all 9 medallions

RPM Completionist Gain all stars in 'RPM'.

Stylish Sorcerer Acquired 60 selectable raiments.

Swimming with the Fishes In Voyage of Despair, kill 50 zombies that are underwater in a single game

108 Swords of Destiny Obtain all of the blades available in the game.

Elements Completionist Gain all stars in 'Elements'.

Ultra, Man! If yer gonna fight, give it your all, pal. Performing 100 Ultra Combos oughta do it, eh?

Go for Gold! In Onslaught, acquire seven gold chalices

Drop the Bass Eliminate both Morgan and Cross in a fall accident and both by dropping a coconut on their heads.

Pac-Dot Attack! Defeat 100 enemies with Pac-Dot and/or Bomb Attacks.
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The architect Finish Mission 5

Seal the Deal Complete a Triumph Seal.

Party-pooper Sabotage the wedding.

Pea Shooter Kill a Rhino with only a pistol in Nightfall in Regular or Hardcore difficulty.

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

Crushing Victory Defeat an enemy by using the shafts at Fort City

40 Knives! Kill 40 zombies with the bowie knife. (Map Pack 3 only)

Ancient Marrakesh Reach Marrakesh Mastery Level 20.

One Night in Bangkok Reach Bangkok Mastery Level 20.

Laser Eye Surgery Kill the eye cube while pulling back the arrow

Collector Acquire all items available in normal time attack

Factory Zero You survived Hei Zhen Zhu and RBS using no Praxis kits, weapons, grenades or mines. Whoa.

Perkaholics Anonymous! Survive until round 20 without buying a single Perk. (Map Pack 3 only)

Shame of the Scuttlers (Hermetica Ingloria) See a stark naked scuttler. Feel his shame.

InHurt Defeat Inhert

Frequent Flyer! Use the teleporter 8 times. (Map Pack 3 only)

Space Area Maze Clear all Space Area Maze Stages.
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A Series of Unfortunate Events Eliminate Mendola with the crystal ball, Kong in an electrocution, and both by poisoning the pipe.

Young Ognathologist (Ognadae Ognadae) Get a good look at an Ognapod.

World Peace... For Now Beat the game on all difficulties.

Taking You Down Defeat Zakat

Mist Start playing Shamplin 1.