It's a Trap!

10
Story progression in Act 1, Chapter 2
Escort Service

10
Story progression in Act 1, Chapter 4
Once More, With Feeling

10
Perform 30 perfect Active Reloads (any mode)
Girl About Town

10
Story progression in Act 1, Chapter 6
Green as Grass

10
Train the rook (any difficulty)
That Sinking Feeling

10
Story progression in Act 2, Chapter 4
Collector

5
Recover 5 collectibles (any difficulty)
Freebaird!

10
Story progression in Act 2, Chapter 5
Heartbroken

10
Story progression in Act 2, Chapter 6
Longitude and Attitude

10
Story progression in Act 3, Chapter 3
Tanks for the Memories

10
Story progression in Act 3, Chapter 4
One-Night Stand

10
Complete 1 chapter in Co-op on any difficulty (Marcus or Dom)
Water Sports

10
Story progression in Act 3, Chapter 6
There's a Time for Us

10
Story progression in Act 4, Chapter 2
Better Wrapped in Beacon

10
Story progression in Act 4, Chapter 3
Have Fun Storming the Castle

10
Story progression in Act 4, Chapter 6
You Are the Support, Son

10
Story progression in Act 5, Chapter 2
And the Horsey You Rode in On

10
Story progression in Act 5, Chapter 1
Brumak Rodeo

10
Story progression in Act 5, Chapter 4
Does This Look Infected to You?

10
Story progression in Act 5, Chapter 5
Tourist of Duty

25
Complete all campaign acts on Casual Difficulty
Smells Like Victory

10
Kill 30 enemies with the Scorcher Flamethrower (any mode)
Dirty, Dirty Horde

20
Survive the first 10 waves of Horde (any difficulty, any map)
Guerilla Tactician

50
Complete all campaign acts on Normal Difficulty
Shock and Awe

10
Kill 30 enemies with the heavy Mortar (any mode)
Organ Grinder

10
Kill 30 enemies with a cover mounted Mulcher (any mode)
Variety Is the Spice of Death

30
Kill an enemy with every weapon in the game (any mode)
Open Relationship

30
Complete 10 chapters in Co-op on any difficulty (Marcus or Dom)
Takes a Licking

30
Melee 30 Tickers (any mode)
Artist of War

75
Complete all campaign acts on Hardcore Difficulty
Photojournalist

10
Submit a spectator photo
Back to Basic

10
Successfully complete the 5 lessons of multiplayer Training Grounds
Pack Rat

15
Recover 20 collectibles (any difficulty)
Crowd Control

10
Melee 10 enemies down with the Boomshield equipped (any mode)
Said the Spider to the Fly

10
Kill 10 enemies with a planted grenade (any mode)
Crossed Swords

10
Win 10 chainsaw duels (any mode)
Friends with Benefits

50
Complete all acts in Co-op on any difficulty (Marcus or Dom)
Hoard the Horde

30
Survive all 50 waves of Horde (any difficulty, any map)
Around the World, Again

30
Win a multiplayer match on each of the 10 shipped maps (any mode)
Pound of Flesh

10
Use a meatshield to save your life 10 times (any mode)
Kick 'Em When They're Down

10
Perform all 11 unique executions on a downed enemy
Rookie Gear

10
Earn enough multiplayer experience to reach level 5 (not Custom)
A Parting Gift

20
Kill 10 enemies with a grenade while down but not out (any mode)
Suicide Missionary

150
Complete all campaign acts on Insane Difficulty
You Go Ahead, I'll Be Fine

10
Win 3 matches of King of the Hill (not Custom)
Seasoned Gear

20
Earn enough multiplayer experience to reach level 15 (not Custom)
Completionist

30
Recover all 41 collectibles (any difficulty)
More Mystery, Less History

15
Win a multiplayer match on each of the 5 Flashback Map Pack maps (any mode except Wingman)
Battle-Tested Gear

30
Earn enough multiplayer experience to reach level 25 (not Custom)
The Roof! The Roof! The Roof…

15
Win a multiplayer match on each of the 3 Combustible Map Pack maps (any mode except Wingman)
Frigid Body Dynamics

5
Play a multiplayer match on each of the 4 Snowblind Map Pack maps (any mode)
Skeletons in your Closet

20
Complete waves 1 through 10 on all Flashback Map Pack maps in Horde (any difficulty)
The Weather Outside Is Lethal

15
Win a multiplayer match on each of the 4 Snowblind Map Pack maps (any mode)
Highway to Hell

25
Complete the "Road to Ruin" deleted scene after choosing the guns blazing option
It's Good to be the King

10
Win 10 rounds of Guardian as the leader (not Custom)
Party Like It's 1999

30
Play 1999 rounds of multiplayer (any mode)
Bound by a Shared Past

15
Win a Wingman match on each of the 5 Flashback Map Pack maps
Standing Here, Beside Myself

10
Win 3 matches of Wingman (not Custom)
Two for the Road

25
Complete the "Road to Ruin" deleted scene in co-op as either Marcus or Dom
Afraid of the Dark

20
Play a multiplayer match on each of the 7 Dark Corners Map Pack maps (any mode)
Trial by, and on, Fire

20
Survive first 10 Horde waves on Combustible Map Pack maps as a team
Forged in the Fire

15
Win a Wingman match on each of the 3 Combustible Map Pack maps
My Way or the Highway

25
Without being detected, complete the "Road to Ruin" deleted scene after choosing the stealth option
Did Not Go Gentle

30
Win a multiplayer match on each of the 7 Dark Corners Map Pack maps (any mode)
Never Eat Red Snow

20
Complete waves 1 through 10 on all Snowblind Map Pack maps in Horde (any difficulty)
Battle-Hardened Gear

50
Reach level 50 and play a match on each of the 4 Snowblind Map Pack maps (not Custom)
Ride It All Night Long

10
Reach level 10 in multiplayer and complete waves 1 - 10 on the Highway map in Horde
Lost in Transition

20
Reach level 20 in multiplayer and complete waves 1 - 20 on the Way Station map in Horde
Be Careful What You Wish For

10
Reach level 8 in multiplayer and complete waves 1 - 10 on the War Machine map in Horde
No, But His Face Rings a Bell

15
Reach level 15 in multiplayer and complete waves 1 - 20 on the Sanctuary map in Horde
Annex: Now With Execution Rules

75
Win an Annex match on each Flashback and Combustible Map Pack map (not Custom)
Icy Dead People

25
Complete waves 1 through 50 on any Snowblind Map Pack map in Horde (any difficulty)
Beat the Meatflag

10
Capture 10 meatflags in Submission (not Custom)
Like Father, Like Gun

30
Reach level 30 in multiplayer and complete waves 1 - 30 on the Allfathers Garden map in Horde
Am I Only Dreaming?

40
Reach level 40 in multiplayer and complete waves 1 - 40 on the Memorial map in Horde
Blood on the Sand

50
Reach level 50 in multiplayer and complete waves 1 - 50 on the Nowhere map in Horde
Is It Hot or Is That Just You?

25
Kill 25 Bloodmounts with a Scorcher while playing Horde on a Dark Corners Map Pack map
Seriously 2.0

50
Kill 100,000 enemies (any mode)
Veteran Gear

75
Reach level 100 and win a match on each of the 4 Snowblind Map Pack maps (not Custom)