| Achievement | How to unlock |
| A Parting Gift (20 points) | Kill 10 enemies with a grenade while down but not out (any mode).
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| And the Horse You Rode in On (10 points) | Story progression in Act 5, Chapter 1.
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| Around the World, Again (30 points) | Win a multiplayer match on each map (any mode).
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| Artist of War (75 points) | Complete all campaign acts on Hardcore Difficulty.
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| Back to Basic (10 points) | Successfully complete the 5 lessons of multiplayer Training Grounds.
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| Beat the Meatflag (10 points) | Capture 10 meatflags in Submission (public).
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| Better Wrapped in Beacon (10 points) | Story progression in Act 4, Chapter 3.
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| Brumak Rodeo (10 points) | Story progression in Act 5, Chapter 4.
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| Collector (5 points) | Recover 5 collectibles (any difficulty).
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| Completionist (30 points) | Recover all 41 collectibles (any difficulty).
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| Crossed Swords (10 points) | Win 10 chainsaw duels (any mode).
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| Crowd Control (10 points) | Melee 10 enemies down with the Boomshield equipped (any mode).
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| Dirty, Dirty Horde (20 points) | Survive the first 10 waves of Horde (any difficulty, any map).
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| Does This Look Infected to You? (10 points) | Story progression in Act 5, Chapter 5.
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| Escort Service (10 points) | Story progression in Act 1, Chapter 4.
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| Freebaird! (10 points) | Story progression in Act 2, Chapter 5.
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| Friends with Benefits (50 points) | Complete all acts in co-op on any difficulty (Marcus or Dom).
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| Girl About Town (10 points) | Story progression in Act 1, Chapter 6.
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| Green as Grass (10 points) | Train the rook (any difficulty).
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| Guerilla Tactician (50 points) | Complete all campaign acts on Normal Difficulty.
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| Have Fun Storming the Castle (10 points) | Story progression in Act 4, Chapter 6.
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| Heartbroken (10 points) | Story progression in Act 2, Chapter 6.
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| Hoard the Horde (30 points) | Survive all 50 waves of Horde (any difficulty, any map).
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| It's a Trap! (10 points) | Story progression in Act 1, Chapter 2.
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| It's Good to be the King (10 points) | Win 10 rounds of Guardian as the leader (public).
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| Longitude and Attitude (10 points) | Story progression in Act 3, Chapter 3.
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| Once More, With Feeling (10 points) | Perform 30 perfect active reloads (any mode).
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| One-Night Stand (10 points) | Complete 1 chapter in co-op on any difficulty (Marcus or Dom).
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| Open Relationship (30 points) | Complete 10 chapters in co-op on any difficulty (Marcus or Dom).
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| Organ Grinder (10 points) | Kill 30 enemies with a cover mounted Mulcher (any mode).
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| Pack Rat (15 points) | Recover 20 collectibles (any difficulty).
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| Party Like It's 1999 (30 points) | Play 1999 rounds of multiplayer (any mode).
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| Said the Spider to the Fly (10 points) | Kill 10 enemies with a planted grenade (any mode).
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| Seriously 2.0 (50 points) | Kill 100,000 enemies (any mode).
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| Shock and Awe (10 points) | Kill 30 enemies with the heavy Mortar (any mode).
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| Smells Like Victory (10 points) | Kill 30 enemies with the Scorcher Flamethrower (any mode).
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| Standing Here, Beside Myself (10 points) | Win 3 matches of Wingman (public).
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| Suicide Missionary (150 points) | Complete all campaign acts on Insane Difficulty.
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| Takes a Licking (30 points) | Melee 30 Tickers (any mode).
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| Tanks for the Memories (10 points) | Story progression in Act 3, Chapter 4.
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| That Sinking Feeling (10 points) | Story progression in Act 2, Chapter 4.
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| There's a Time for Us (10 points) | Story progression in Act 4, Chapter 2.
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| Tourist of Duty (25 points) | Complete all campaign acts on Casual Difficulty.
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| Variety Is the Spice of Death (30 points) | Kill an enemy with every weapon in the game (any mode).
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| Water Sports (10 points) | Story progression in Act 3, Chapter 6.
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| You Are the Support, Son (10 points) | Story progression in Act 5, Chapter 2.
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| You Go Ahead, I'll Be Fine (10 points) | Win three matches of King of the Hill (public).
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