- That Sinking Feeling
Story progression in Act 2, Chapter 4
Unlocked offline - 1 guide
- Open Relationship
Complete 10 chapters in Co-op on any difficulty (Marcus or Dom)
Unlocked offline - 1 guide
- Girl About Town
Story progression in Act 1, Chapter 6
Unlocked offline - 1 guide
- Freebaird!
Story progression in Act 2, Chapter 5
Unlocked offline - 2 guides
- Party Like It's 1999
Play 1999 rounds of multiplayer (any mode)
19 February 2009 - 11 guides
- Suicide Missionary
Complete all campaign acts on Insane Difficulty
29 January 2009 - 8 guides
- Beat the Meatflag
Capture 10 meatflags in Submission (not Custom)
15 December 2008 - 4 guides
- Completionist
Recover all 41 collectibles (any difficulty)
24 November 2008 - 3 guides
- Does This Look Infected to You?
Story progression in Act 5, Chapter 5
24 November 2008 - 1 guide
- Friends with Benefits
Complete all acts in Co-op on any difficulty (Marcus or Dom)
24 November 2008 - 4 guides
- Tourist of Duty
Complete all campaign acts on Casual Difficulty
24 November 2008 - 2 guides
- Guerilla Tactician
Complete all campaign acts on Normal Difficulty
24 November 2008 - 1 guide
- Artist of War
Complete all campaign acts on Hardcore Difficulty
24 November 2008 - 4 guides
- Brumak Rodeo
Story progression in Act 5, Chapter 4
24 November 2008 - 1 guide
- You Are the Support, Son
Story progression in Act 5, Chapter 2
24 November 2008 - 1 guide
- And the Horsey You Rode in On
Story progression in Act 5, Chapter 1
24 November 2008 - 1 guide
- Have Fun Storming the Castle
Story progression in Act 4, Chapter 6
23 November 2008 - 1 guide
- Pound of Flesh
Use a meatshield to save your life 10 times (any mode)
21 November 2008 - 10 guides
- Pack Rat
Recover 20 collectibles (any difficulty)
20 November 2008 - 1 guide
- It's Good to be the King
Win 10 rounds of Guardian as the leader (not Custom)
19 November 2008 - 11 guides
- Hoard the Horde
Survive all 50 waves of Horde (any difficulty, any map)
18 November 2008 - 10 guides
- Better Wrapped in Beacon
Story progression in Act 4, Chapter 3
17 November 2008 - 1 guide
- There's a Time for Us
Story progression in Act 4, Chapter 2
15 November 2008 - 1 guide
- Water Sports
Story progression in Act 3, Chapter 6
13 November 2008 - 1 guide
- A Parting Gift
Kill 10 enemies with a grenade while down but not out (any mode)
12 November 2008 - 7 guides
- Organ Grinder
Kill 30 enemies with a cover mounted Mulcher (any mode)
11 November 2008 - 3 guides
- Kick 'Em When They're Down
Perform all 11 unique executions on a downed enemy
11 November 2008 - 1 guide
- Around the World, Again
Win a multiplayer match on each of the 10 shipped maps (any mode)
11 November 2008 - 3 guides
- Tanks for the Memories
Story progression in Act 3, Chapter 4
09 November 2008 - 1 guide
- Longitude and Attitude
Story progression in Act 3, Chapter 3
09 November 2008 - 1 guide
- Takes a Licking
Melee 30 Tickers (any mode)
09 November 2008 - 4 guides
- Said the Spider to the Fly
Kill 10 enemies with a planted grenade (any mode)
09 November 2008 - 5 guides
- Smells Like Victory
Kill 30 enemies with the Scorcher Flamethrower (any mode)
09 November 2008 - 4 guides
- Green as Grass
Train the rook (any difficulty)
09 November 2008 - 4 guides
- Dirty, Dirty Horde
Survive the first 10 waves of Horde (any difficulty, any map)
09 November 2008 - 3 guides
- Shock and Awe
Kill 30 enemies with the heavy Mortar (any mode)
09 November 2008 - 4 guides
- Crowd Control
Melee 10 enemies down with the Boomshield equipped (any mode)
09 November 2008 - 4 guides
- Crossed Swords
Win 10 chainsaw duels (any mode)
09 November 2008 - 4 guides
- Heartbroken
Story progression in Act 2, Chapter 6
09 November 2008 - 1 guide
- Standing Here, Beside Myself
Win 3 matches of Wingman (not Custom)
09 November 2008 - 6 guides
- Variety Is the Spice of Death
Kill an enemy with every weapon in the game (any mode)
08 November 2008 - 2 guides
- You Go Ahead, I'll Be Fine
Win 3 matches of King of the Hill (not Custom)
08 November 2008 - 4 guides
- Back to Basic
Successfully complete the 5 lessons of multiplayer Training Grounds
08 November 2008 - 3 guides
- Collector
Recover 5 collectibles (any difficulty)
07 November 2008 - 1 guide
- Photojournalist
Submit a spectator photo
07 November 2008 - 7 guides
- Escort Service
Story progression in Act 1, Chapter 4
07 November 2008 - 1 guide
- It's a Trap!
Story progression in Act 1, Chapter 2
07 November 2008 - 1 guide
- Once More, With Feeling
Perform 30 perfect Active Reloads (any mode)
07 November 2008 - 4 guides
- One-Night Stand
Complete 1 chapter in Co-op on any difficulty (Marcus or Dom)
07 November 2008 - 2 guides
- Seriously 2.0
Kill 100,000 enemies (any mode)
Locked - 9 guides
- Lost in Transition
Reach level 20 in multiplayer and complete waves 1 - 20 on the Way Station map in Horde
Unlocked offline - 1 guide
- Like Father, Like Gun
Reach level 30 in multiplayer and complete waves 1 - 30 on the Allfathers Garden map in Horde
18 October 2010 - 3 guides
- Blood on the Sand
Reach level 50 in multiplayer and complete waves 1 - 50 on the Nowhere map in Horde
16 October 2010 - 7 guides
- Am I Only Dreaming?
Reach level 40 in multiplayer and complete waves 1 - 40 on the Memorial map in Horde
15 October 2010 - 4 guides
- Is It Hot or Is That Just You?
Kill 25 Bloodmounts with a Scorcher while playing Horde on a Dark Corners Map Pack map
16 September 2010 - 6 guides
- Ride It All Night Long
Reach level 10 in multiplayer and complete waves 1 - 10 on the Highway map in Horde
25 April 2010 - 1 guide
- My Way or the Highway
Without being detected, complete the "Road to Ruin" deleted scene after choosing the stealth option
02 August 2009 - 5 guides
- Be Careful What You Wish For
Reach level 8 in multiplayer and complete waves 1 - 10 on the War Machine map in Horde
02 August 2009 - 2 guides
- Did Not Go Gentle
Win a multiplayer match on each of the 7 Dark Corners Map Pack maps (any mode)
02 August 2009 - 3 guides
- No, But His Face Rings a Bell
Reach level 15 in multiplayer and complete waves 1 - 20 on the Sanctuary map in Horde
29 July 2009 - 3 guides
- Two for the Road
Complete the "Road to Ruin" deleted scene in co-op as either Marcus or Dom
29 July 2009 - 4 guides
- Highway to Hell
Complete the "Road to Ruin" deleted scene after choosing the guns blazing option
29 July 2009 - 1 guide
- Afraid of the Dark
Play a multiplayer match on each of the 7 Dark Corners Map Pack maps (any mode)
28 July 2009 - 2 guides