Here is the full list of all 39 Bullet Bunny achievements.
Beat any mode one time.
Beat the game in Dark Mode.
Survive 750 Seconds in Extraction Mode..
Survive 1000 Seconds in Endless.
Beat Insane Mode with Pulse.
Beat Insane Mode with Bones
Beat Insane Mode with Magnet.
Beat Insane Mode with Nikki.
Beat Insane Mode with Blink.
Beat Insane Mode with Porter.
Beat Insane Mode with Payne.
Beat Insane Mode with Haze.
Beat Insane Mode with Mo.
Beat Insane Mode with Rooty.
Summon over 100 dogs in one match.
Deal 30,000 summon damage in one match.
Get 100,000 points in any mode.
Unlock every gun.
Unlock everything.
Unlock all the accessories (backgear).
Unlock all the heroes.
Beat the game with Haze using Toxic Blaster (Hard+).
Beat the game as Payne using Rigby (Hard+).
Beat the game as Bones using Bone Barrel(Hard+).
Get 25,000 points in any game mode.
Get 50,000 points in any game mode.
Buy something at the vending machine.
Deal 50,000 gun damage in a game.
Deal 50,000 fire damage in a game.
Deal 30,000 Turret damage in a game.
Beat the game as Rooty using Justomasi (Hard+).
Beat the game as Mo using Zeppelin (Hard+).
Beat the game as Porter using Lavash (Hard+).
Beat the game as Mag using Unescritormas (Hard+).
Beat the game as Blink using Vuelle (Hard+).
Beat the game as Pulse using Doom Cannon (Hard+).
Beat the game as Nikki using Nozia (Hard+).
Beat the game without moving.
Beat the game without shooting.