Here is the full list of all 88 BrainBread 2 achievements.
Get 50 kills with the axe
Get 300 kills with the AK-74
Complete 'Colosseum' with 4 or more people
Get 300 kills with the MAC11
Win a match in the Arena
Kill 1,000 zombies
Get 300 kills with the HK MP7
Complete 'Termoil' with 4 or more people
Get 240 kills with the Famas
Kill Fred
Kill someone with a propane tank
Get the briefcase
Kill 100 zombies
Kill a human
Complete 'Laststand' with 4 or more people
Kill 25 zombies
Reach level 5
Your first zombie kill
Kill 20,000 zombies
Activate the Reality Phase special
Get 35 kills with the combat knife
Don't throw the grenade just yet!
Reach level 50
Get 200 kills with the Double Barrel
Get 280 kills with the Sledgehammer
Get 280 kills with the Machete
Get 200 kills with any explosive material
Survive an entire game in Arena without using any firearms
Get 200 kills with the Desert Eagle
Get 150 kills with the Beretta
Get 200 kills with the Glock17
Get 500 kills with any dual weapon
Get total of 240 kills with the Winchester
Get 300 kills with the G36c
Get 300 kills with the Uzi
Get 300 kills with the HK MP510
Get 150 kills with the Remington 700
Get 12,000 kills with the Minigun
Get 80 kills with a Baseball Bat
Get 100 kills with the fists
and you get nothing instead..
At least he ain't a zombie
Reach Level 100
Reach Level 150
Reach Level 500
Reach Level 350
Get 210 kills with the Remington 870
You can't stop this hump train
Complete The tutorial
Complete the 'The Rooftops' with 4 or more people
Complete 'Barracks: Arena' with 4 or more people
Get 120 kills with the Hatchet
Complete 'Cargo' with 4 or more people
Complete 'Swamp Trouble' with 4 or more people
Complete 'Devils Crypt' with 4 or more people
Survive an entire game in Objective without using any firearms
Use at least 10 healthkits in a single life
Complete 'Salvage' with 4 or more people
Complete 'Carnage' with 4 or more people
Kick 25, punch 20 and uppercut 15 zombies to death in a single life
Get 69 headshots in a single life
Kill three zombie players with headshots in a single life
Deal a total amount of 1.000.000 damage to your foes!
Slice off, or explode at least 250 zombie heads
Complete 'Nightclub' with 4 or more people
Kill 500 bandits
Kill 1,000 bandits
Complete 'Swamp Trouble' Objective with 4 or more people
Complete 'Compound' with 4 or more people
Complete 'Fever: Objective' with 4 or more people
Complete 'Island: Arena' with 4 or more people
Complete 5 quests
Complete 'Surgery' with 4 or more people
Complete 25 quests
Kill 25 Humans when playing as a zombie
Activate the Gunslinger special
Activate the Blood Rage special
Activate Zombie Rage
Become infected