Full Gameplay Walkthrough...

Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Air Raid	Kill 1,000 enemies using an Operator's drone.
Ammo Saver	Kill 300 enemies with Nuker explosions.
Arms Baron	Upgrade a weapon to its maximum level.
Bloodhound	Finish a mission while carrying the Sludge Seed.
Bull's-Eye	Kill fifteen enemies in a single shot with the Fireball ability.
Can Opener	Open a stash using the vehicle's winch.
Catch and Kill: Master	Complete "Catch and Kill" on Very Hard difficulty.
Catch and Kill	Complete "Catch and Kill" on any difficulty.
Chill Out!	Overheat a machine gun ten times.
Church of the Damned: Master	Complete "Church of the Damned" on Very Hard difficulty.
Church of the Damned	Complete "Church of the Damned" on any difficulty.
Clean Run	Complete "Root of Evil" without a sludge infection.
Clear the Path	Kill hundred sludge tendrils.
Cold Cruelty	Kill 5,000 enemies with melee weapons.
Deliver Us: Master	Complete "Deliver Us" on Very Hard difficulty.
Deliver Us	Complete "Deliver Us" on any difficulty.
Demon Bait: Master	Complete "Demon Bait" on Very Hard difficulty.
Demon Bait	Complete "Demon Bait" on any difficulty.
Elusive	Avoid capture by a Snare after being its target.
Fast Reflexes	Kill a Snare after it grabs a teammate but before it damages them.
From Beginning to End	Complete all campaign missions on any difficulty.
Gold Digger	Collect 10,000 Sludgite during campaign missions.
Goon Derailer	Kill a charging Goon with Combat Gear.
High Octane: Master	Complete "High Octane" on Very Hard difficulty.
High Octane	Complete "High Octane" on any difficulty.
Hold the Door!	Prevent enemies from damaging the church gates in "Church of the Damned".
Hot Cruelty	Kill 1,000 enemies by blowing up fuel barrels or gas canisters.
Impasse: Master	Complete "Impasse" on Very Hard difficulty.
Impasse	Complete "Impasse" on any difficulty.
Improper Use	Kill hundred enemies using gas canisters as melee weapons.
Is That All You Got?	Complete a mission on Very Hard difficulty without getting incapacitated.
Mechanic	Restore 100,000 HP to vehicles.
Natural Born Healer	Restore 10,000 HP to teammates using the Healing Aura ability.
Ride Together, Die Together	Complete any mission with three players from your in-game friend list.
Road Trip	Travel 50km total in any type of vehicle.
Root of Evil: Master	Complete "Root of Evil" on Very Hard difficulty.
Root of Evil	Complete "Root of Evil" on any difficulty.
Sage	Reach maximum level with every class.
Sharpshooter	Deal 100,000 damage to enemies' weak spots.
Shield Basher	Kill 500 enemies using a Defender's barrier.
Slob Slayer	Kill a Slob using a melee weapon.
Smell of Napalm	Set thirty enemies on fire with a single Molotov cocktail.
Test Driver	Drive each vehicle type at least once.
That's a Good Deal!	Kill fifty enemies with a single heavy weapon without switching between weapons.
The Drop: Master	Complete "The Drop" on Very Hard difficulty.
The Drop	Complete "The Drop" on any difficulty.
The Pit: Master	Complete "The Pit" on Very Hard difficulty.
The Pit	Complete "The Pit" on any difficulty.
Topped Off	Refuel the car's gas tank thirty times.
Toxic Commando: Master	Complete all campaign missions on Very Hard difficulty.
Untouchable	Complete a mission on Hard or Very Hard difficulty without taking damage.
Vehicular Homicide	Run over 1,000 enemies with a vehicle.
We Are Professionals	Complete a campaign mission without any of your teammates getting incapacitated.
We're All Friends Here	Complete a campaign mission without damaging your teammates.
Weapon Connoisseur	Kill at least one enemy with nineteen primary or secondary weapons.
Who's Counting Anyway?	Kill 53,601 enemies.