Here is the full list of all 45 BDSM: Big Drunk Satanic Massacre achievements.
Rise from the dead
Complete all quests
Max out the bottle bar
Spend 3 hours fighting
Max out your HP bar
The ending: LOU marries Angelica
Max out the ammo bar
Complete "Save our bones" quest
Defeat Big Wac
Solve the game, any ending
The ending: LOU agrees to Big Wac's proposal
Complete the Interview quest
Defeat 100 enemies with BFG
Defeat Black Overlord
Defeat 100 enemies with Soulgun
Complete Back to School quest
Complete Soldier of Fate the Infector quest
Blow up 20 vending machines
Defeat 30 tourists
Complete Metal Gear Pony quest
Use rage 20 times
Defeat 100 burgers
Buy 5 abilities in store
Defeat Nerdomancer
Defeat El Roico
Defeat 100 enemies with a bazooka shot
Spend 100 grand
Complete the quest with Mort's girlfriend
Collect 100.000 coins
Defeat 30 enemies with dash
Summon 20 imps with magic
Defeat 30 enemies with minions
Defeat Behemoth
Blow up 5 enemies with one grenade (AK 47 alt attack)
Open 20 doors
Defeat 500 enemies
Defeat 100 enemies with AK 47
Complete "Steak from Hell" quest
Blow up 50 barrels
Defeat 10 enemies by blasting a barrel
Defeat 15 enemies in 3 seconds
Defeat 50 enemies with a revolver
Don't use bottles during one level
Complete "Love is Blind" quest
Defeat 50 enemies with a shotgun