Mertzi

To Know Your Enemy... Get 100 Kills while using Mutant Injections in Zombies

Abomination Domination Complete Overgrown Temple on Adventure or Apocalypse difficulty.

Has science gone too far? Get a kill using the HT-95 Levkov, XD-1 Accipiter, Rorsch Mk-1, and Schipunov 42

Rank 2 Cleared! Clear rank 2 of the challenge tournaments

Overkill Obliteration - Kill all enemy snipers with explosives

The Polaroid Beat Cathedral 5 times

Friendly Talk to all family members on Ghost Island.
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First Blood Finish a round of Last Stand

Three Sir! Kill a worm with the Holy Hand Grenade

Siege Complete the "Light 'Em Up" Special Ops mission on any difficulty.

Not a Scratch Finish with your tank at full health in the "Iron Clad" Special Ops mission.

Hired Gun Complete 20 Contracts in MWZ

Downforce Completionist Gain all stars in 'Downforce'.

My First Eagle! Score an eagle in a recorded official round

Lamborghini Completionist Gain all stars in 'Lamborghini'.

Diamond in the Rough Solve the first case on Cordona.

Full Master Earn all Gold Medals available in Mastery Challenge

Saving Private Reiner Obliteration - Don't kill any members of the Reiner family

Sheriff moustache Masterful! You intervened just in time! Your fortuitous telephone call probably saved the life of the owner of the Black Swan Hotel.

Midnight Completionist Gain all stars in 'Midnight'.

Deforestation Kill 15 Seeder Turrets in one game in Mayday in Regular or Hardcore difficulty.

Pac-Man Begins Play original PAC-MAN.

Ruins Area Maze Clear all Ruins Area Maze Stages.
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The Ultimate Skydive! Skydive uninterrupted from the highest point possible to the lowest point possible!

My First Cart Ride! Take a ride in a golf cart

The Negative Beat Sheol 5 times

Fertilizer Man Kill 200 zombies in a single game. (Map Pack 2 only)

Egg-stra XP! Complete the Egg-Stra XP challenge and then destroy a hive in the Onslaught DLC package.

New 'n' Hasty Rescue every Mudokon with an overall Best Time of 3:00:00 or less

Dunk Tank Come on and slam and welcome to the Amazon.

Untouchable Use only one self revive care package in the "Special Delivery" Special Ops mission.

Big Brawler Get 10 consecutive zombie melee kills before Insta-Kill expires. (Map Pack 2 only)

Write Off Kill 500 Enemies using an Insured Weapon in MWZ

Survival Skills Complete Dingy Jungle without using a healing potion or losing a life.

Against All Odds Mudokon God, Mudokon Saviour

Band of Blubbers Rescue five of your brethren from an awful fate.

Duet Play an instrument next to another player, who's playing a different instrument

Full Marks Infiltration - Complete all the Challenges

Walk in the Park Complete the game on hard using hardcore mode

Frequent Flyer BASE jump and travel more than 150 m with your parachute

Fling Me to the Moon In Der Eisendrache, use every Wundersphere twice.

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

FIR Collector Hit all fairways in regulation in an 18 hole round on an official course.

Horsepower Completionist Gain all stars in 'Horsepower'.

Thrillseeker Unlock Carnival of the Dead

Ravenous Stud Collector Collect 60,000+ studs in a single streak (no more than a 2 second gap between each stud collected)

The Secret Gardener Orange no-thumbs are the new green thumbs.

Trine 2 Hard Earn all Trophies in Trine 2

Totally Bombed! Win a Local match against 3+ CPU players after being in a Super Revenge Cart.

Isaac's Tears Kill Isaac with Isaac