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That's a Good Deal! Kill 50 enemies with a single heavy weapon without switching between weapons.

The Pit Complete "The Pit" on any difficulty.

From Beginning to End Complete all campaign missions on any difficulty.
9/9

Vehicular Homicide Run over 1,000 enemies with a vehicle.
1000/1000

Hot Cruelty Kill 1,000 enemies by blowing up fuel barrels or gas canisters.
1000/1000

Test Driver Drive each vehicle type at least once.
10/10

Deliver Us Complete "Deliver Us" on any difficulty.

Topped Off Refuel the car's gas tank 30 times.
30/30

Catch and Kill Complete "Catch and Kill" on any difficulty.

Clean Run Complete "Root of Evil" without a sludge infection.

We Are Professionals Complete a campaign mission without any of your teammates getting incapacitated.

Smell of Napalm Set 30 enemies on fire with a single Molotov cocktail.

Root of Evil Complete "Root of Evil" on any difficulty.

Demon Bait Complete "Demon Bait" on any difficulty.

Sharpshooter Deal 100,000 damage to enemies' weak spots.
100000/100000

Arms Baron Upgrade a weapon to its maximum level.

Impasse Complete "Impasse" on any difficulty.

Bloodhound Finish a mission while carrying the Sludge Seed.

Ammo Saver Kill 300 enemies with Nuker explosions.
300/300

Clear the Path Kill 100 sludge tendrils.
100/100

High Octane Complete "High Octane" on any difficulty.

Gold Digger Collect 10,000 Sludgite during campaign missions.
10000/10000

Church of the Damned Complete "Church of the Damned" on any difficulty.

Bull's-Eye Kill 15 enemies in a single shot with the Fireball ability.
15/15

Elusive Avoid capture by a Snare after being its target.

The Drop Complete "The Drop" on any difficulty.

Can Opener Open a stash using the vehicle's winch.

Nothing Lasts Forever Unlock everything

Friends Reunited Find all coffins and unlock the secret ending

Destruction Derby Wreck 24 cars from the comfort of your own vehicle

Just Making Sure Get your revenge on the Sniper

Friends Like These Accidentally shoot your friend

Hidden in rubble Find all secrets in the final three chapters
11/11

Beneath the Mask Find all masks
18/18

Prayer for the Dying Pay tribute at all hidden statues
5/5

A Proper Gander Find and tear down all posters
20/20

Non-Cannonical Fire at the secondary target with the cannon

Hidden among rats Find all secrets in the middle three chapters
17/17

Secret Bunker Input the secret code

Shot Through the Heart Kill 10 Spider Kids while fighting the Mother

Lullabye Play the piano

Creature Comforts Comfort the scared pig

Long Live The King Steal the crown from the leader of the Spider Kids

Scared to Dust Break all petrified kids in the clock tower

Hidden among the pines Find all secrets in the first three chapters
19/19

Lost at Sea Travel a great distance with the boat
10000/10000

Critter Kill Hit Kill every critter
5/5

Take a Load Off Rest your legs at 10 places around the world
10/10

Dark Tourism Push the sightseer into the pit

Emotion Engine! Cleared SSD Speedway.