Here is the full list of all 57 Bunch of Heroes achievements.
Eliminate 35.000 zombies
Eliminate 200 Zombies with market cars
Eliminate 1,000 Walking Coffins
Eliminate 1,000 Generals
Burn 1,000 Zombie Chickens
Kill 5.000 Martians
Eliminate 100 Martian Teleporters
Pickup 1,000 weapons
Perform 100 Ultra Attacks
Reload your extra weapon 1,000 times
Eliminate 200 Martians with melee attacks
Place 100 turrets
Eliminate 100 Flying-Saucers
Roll 20 times while on fire
Complete a multiplayer mission without damaging any allies
Complete 10 4-player missions
Survive up to the 20th wave in Santa's map in any difficulty
While playing with 3 allies get to survival's wave 9 without anyone dying
While playing with 2 allies get to survival's wave 9 without anyone dying
Get to survival's wave 5 in less than 3 minutes
Eliminate 1,000 Zombie Evaders
Eliminate 200 zombies with melee attacks
Complete a mission with each of the characters
While in survival mode get to wave 12 playing alone
Kill 200 Strong Martian
Complete 1 mission without picking up any Ultra Charges
Eliminate 1,000 Zombies with bayonets
Eliminate 1,000 Radioactive Zombies
Complete a mission without dying
Complete a mission without picking up any weapons
Protect 50 cheerleaders
Eliminate 1,000 Zombie Chickens
Check out the Credits
Complete all Mars missions
Complete all missions
Kill the Martian King
Eliminate 200 Martian with shields
Complete a mission with full health
Defeat Fatzi
Complete all cemetery missions
Pickup every weapon in the game
While in survival mode and playing alone: get to wave 3 without having been damaged
Eliminate 723 zombie chickens, 821 basic zombies and 394 zombie astronauts
While in survival mode and playing alone: get to wave 3 in less than 5 minutes
Eliminate 1,000 Basic Zombies
Defeat Jazzy
Complete all farm missions
Defeat Fred
Defeat Pumpking
While playing with 1 ally get to survival's wave 6 without anyone dying
Eliminate 500 zombie astronauts
Perform a 80 kill combo while in survival mode
Kill a Martian Teleporter in survival mode
Reach a combo of 60
Reach a combo of 20
Reach a combo of 40
Get over a 1.000.000 points in survival