1. Green as Grass - Train the rook (any difficulty) - 10 G
   
2. It's a Trap! - Story progression in Act 1, Chapter 2 - 10 G
   
3. Escort Service - Story progression in Act 1, Chapter 4 - 10 G
   
4. Girl About Town - Story progression in Act 1, Chapter 6 - 10 G
   
5. That Sinking Feeling - Story progression in Act 2, Chapter 4 - 10 G
   
6. Freebaird! - Story progression in Act 2, Chapter 5 - 10 G
   
7. Heartbroken - Story progression in Act 2, Chapter 6 - 10 G
   
8. Longitude and Attitude - Story progression in Act 3, Chapter 3 - 10 G
   
9. Tanks for the Memories - Story progression in Act 3, Chapter 4 - 10 G
   
10. Water Sports - Story progression in Act 3, Chapter 6 - 10 G
    
11. There's a Time for Us - Story progression in Act 4, Chapter 2 - 10 G
    
12. Better Wrapped in Beacon - Story progression in Act 4, Chapter 3 - 10 G
    
13. Have Fun Storming the Castle - Story progression in Act 4, Chapter 6 - 10 G
    
14. And the Horse You Rode in On - Story progression in Act 5, Chapter 1 - 10 G
    
15. You Are the Support, Son - Story progression in Act 5, Chapter 2 - 10 G
    
16. Brumak Rodeo - Story progression in Act 5, Chapter 4 - 10 G
    
17. Does This Look Infected to You? - Story progression in Act 5, Chapter 5 - 10 G
    
18. Tourist of Duty - Complete all campaign acts on Casual Difficulty - 25 G
    
19. Guerilla Tactician - Complete all campaign acts on Normal Difficulty - 50 G
    
20. Artist of War - Complete all campaign acts on Hardcore Difficulty - 75 G
    
21. Suicide Missionary - Complete all campaign acts on Insane Difficulty - 150 G
    
22. Collector - Recover 5 collectibles (any difficulty) - 5 G
    
23. Pack Rat - Recover 20 collectibles (any difficulty) - 15 G
    
24. Completionist - Recover all 41 collectibles (any difficulty) - 30 G
    
25. One-Night Stand - Complete 1 chapter in co-op on any difficulty (Marcus or Dom) - 10 G
    
26. Open Relationship - Complete 10 chapters in co-op on any difficulty (Marcus or Dom) - 30 G
    
27. Friends with Benefits - Complete all acts in co-op on any difficulty (Marcus or Dom) - 50 G
    
28. Once More, With Feeling - Perform 30 perfect active reloads (any mode) - 10 G
    
29. Takes a Licking - Melee 30 Tickers (any mode) - 30 G
    
30. Organ Grinder - Kill 30 enemies with a cover mounted Mulcher (any mode) - 10 G
    
31. Shock and Awe - Kill 30 enemies with the heavy Mortar (any mode) - 10 G
    
32. Said the Spider to the Fly - Kill 10 enemies with a planted grenade (any mode) - 10 G
    
33. Crowd Control - Melee 10 enemies down with the Boomshield equipped (any mode) - 10 G
    
34. Smells Like Victory - Kill 30 enemies with the Scorcher Flamethrower (any mode) - 10 G
    
35. Variety Is the Spice of Death - Kill an enemy with every weapon in the game (any mode) - 30 G
    
36. Seriously 2.0 - Kill 100,000 enemies (any mode) - 50 G
    
37. Standing Here, Beside Myself - Win 3 matches of Wingman (public) - 10 G
    
38. Beat the Meatflag - Capture 10 meatflags in Submission (public) - 10 G
    
39. It's Good to be the King - Win 10 rounds of Guardian as the leader (public) - 10 G
    
40. You Go Ahead, I'll Be Fine - Win three matches of King of the Hill (public) - 10 G
    
41. Back to Basic - Successfully complete the 5 lessons of multiplayer Training Grounds - 10 G
    
42. Party Like It's 1999 - Play 1999 rounds of multiplayer (any mode) - 30 G
    
43. Around the World, Again - Win a multiplayer match on each map (any mode) - 30 G
    
44. Dirty, Dirty Horde - Survive the first 10 waves of Horde (any difficulty, any map) - 20 G
    
45. Hoard the Horde - Survive all 50 waves of Horde (any difficulty, any map) - 30 G
    
46. Crossed Swords – Win 10 chainsaw duels (any mode) - 10 G
    
47. A Parting Gift – Kill 10 enemies with a grenade while down but not out (any mode) - 20 G
    
48. Pound of Flesh – Use a meatshield to save your life 10 times (any mode) - 10 G
    
49. Photojournalist – Submit a spectator photo - 10 G
    
50. Kick 'Em When They're Down – Perform all 11 unique executions on a downed enemy - 10G

UPDATED

1. Dom-Curious (10) – Complete one chapter in co-op on any difficulty
   
2. Domination (30) – Complete ten chapters in co-op on any difficulty
   
3. I Can’t Quit You, Dom (50) – Complete all acts in co-op on any difficulty
   
4. Crossed Swords (10) – Win a Chainsaw Duel
   
5. Ain’t Too Proud To Beg (10) – Crawl to a teammate and be revived
   
6. Pound of Flesh (10) – Use a meat shield to absorb a killing blow
   
7. DIY Turret (10) – Use a cover-mounted Gatling gun to kill three enemies without dismounting
   
8. Shock and Awe (10) – Use the mortar to kill three enemies with a single shot
   
9. Said The Spider To The Fly (10) – Kill an enemy with a planted grenade
   
10. Blowed Up Real Good (10) – Kill three enemies with a single grenade tag
    
11. Shake and Bake (10) – Kill three enemies with the flamethrower without reloading
    
12. Variety is the Spice of Death (30) – Kill an enemy with every weapon in the game
    
13. Multi-Talented Executioner (30) – Execute a downed enemy with every weapon in the game
    
14. Seriously 2.0 (50) – Kill 100,000 enemies, total, across all modes  
    
15. It Takes Two (10) – Win Wingman with both team members alive     
    
16. Can Do It All (30) – Win a match of every multiplayer game type
    
17. Around The World (30) – Win one match on each of the 12 MP maps
    
18. Survived To Five (20) – Entire team must survive the first five waves of Horde (any difficulty)
    
19. Survived To Ten (30) – Entire team must survive the first ten waves of Horde (any difficulty)

quote:

ORIGINAL: Breakfast

These achievements look like fun 

Im look forward to getting 100 000 thousand kills....im gonna laugh if anyone boosts this achievement...thatll be an incredible time waste.

quote:

ORIGINAL: Satanas

quote:

ORIGINAL: Breakfast

These achievements look like fun 

Im look forward to getting 100 000 thousand kills....im gonna laugh if anyone boosts this achievement...thatll be an incredible time waste.

You'll be spending a lot more time with this game than anyone else, that's for sure.

quote:

ORIGINAL: Number 9

http://uk.xbox360.ign.com/articles/906/906142p1.html

quote:

ORIGINAL: Icewake

Only 12 maps at launch, mild letdown.

quote:

ORIGINAL: Number 9

http://uk.xbox360.ign.com/articles/906/906142p1.html

quote:

ORIGINAL: harry190

I've seen the term 'boosting' a few times. What does it mean?

quote:

ORIGINAL: Icewake

quote:

ORIGINAL: harry190

I've seen the term 'boosting' a few times. What does it mean?

Help each other get the achievements. You could do it by sending someone on the other team a chat invite and having everyone agree to take turns with kills, things of that nature.