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Sisters of Athena Endurance Co-op Challenge: Kill a combined total of 25 enemies in a single Expedition

Gatherer Find 50% of the collectibles in the campaign

Sisters of Artemis Endurance Co-op Challenge: Kill a combined total of 10 dangerous animals in a single Expedition

Cursed No More Purify a Cursed piece of gear.

Tater Tote Carry science forward

Winner! Win a Special Stage in any off-line game mode.

Undertaker In The Final Reich, kill the Bomber with the shovel.

Stranger Than Friction Master the Propulsion Gel

Quite a lot of deaths that night Found all of the black framed Pictures

Gasoline Cowboy Rescue your allies with the Sherman while keeping your armor above 80% in Collateral Damage.

Outsmarted In singleplayer, get a quadruple kill with a single Frag Grenade

White Out Complete the first Conversion Gel test

Competitive Nature Complete at least one match in each mode

Mechanic Repair your car for the first time.

Scanned Alone Stand in a defective turret detector

Dual Pit Experiment Do the same test twice

Secrets! Lies! Conspiracies, man! Found all Secrets!

Ghost ships are just a myth, right? Found all Pictures

For the Night is Dark Endurance Co-op Challenge: Clear 3 Enemy Camps at night in a single expedition

Teamwork Endurance Co-op Challenge: Warm up from freezing by standing next to a campfire lit by your partner

Communication Skills Endurance Co-op Challenge: Kill 5 enemies that have been marked by your partner

Channel Changer Take control of the enemy held radio and capture it with just seconds remaining

Tunnel of Funnel Master the Excursion Funnel

The Part Where He Kills You This is that part

Lunacy That just happened

Alone Time Endurance Co-op Challenge: Spend at least one day more than 60 meters apart

Challenge Accepted Complete all challenges in a single mission.

"Teamwork" Endurance Co-op Challenge: Collect an Artifact while your partner is down

Get Away from Her! Endurance Co-op Challenge: Kill an enemy melee attacking your partner

Podium Finish in the top three in a Special Stage in Career mode.

Looks good on your C.V. Win a Special Stage in Career mode.

No One Left Behind Endurance Co-op Challenge: Revive a player 3 times in a single expedition

Fire and Brimstone Kill 5 enemies with a single artillery strike

"I'm all in." Complete 'Suburban Shakedown' as Tyler.

Queen Anne’s Revenge Playing as Blackbeard, perform an acrobatic kill and a gun kill in less than 10 seconds.

Deadshot Demon Complete the entire main campaign on Sniper Elite difficulty

Conscientious Killer Complete the campaign on any difficulty without shooting any civilians

Ambush King Kill 100 enemies with traps

Duke or Dimwit? Defeated all waves in Duke and Dimwit Theater.

Elevator to the Gallows Kill a player using a lift that has been trapped with Booby Trap.

Master-At-Arms Fully master a rifle, secondary weapon and pistol

Fireworks In The Final Reich, retrieve the artifact.

Good Listener Take GLaDOS' escape advice

Rope-a-Dope In CitC, knock an enemy around the city with Undertow, then knock him off the edge of the city.

Rooftop Ruffian Defeated all waves in Raven's Dome.

Museum Curator In CitC, unlocked all Gallery items.

Missile Defense System In CitC, killed an enemy with splash damage by shooting a rocket out of the air.

Keeping your Distance Total kill distance of 100 Kilometres

What Is Dead Can Sometimes Die Kill 1,000 Undead enemies with corpses.

"Beam me up, Scotty" Respawn manually for the first time.