Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Ashes to Ashes	Complete the hidden objective in The Ashes of Sker Hotel.
Bad Reception	Defeat Isaac.
Book of the Dead	Find all lore notes in Sewers of the Dead.
Dark Side	Survive a Dark Round without receiving damage.
Deadly Lover's Nightmare	Complete Deadly Lover's Fortress on Nightmare Difficulty.
Deadly Lovers	Defeat Elisabeth and Thomas.
Dungeon Crawler	Visit every location in the Deadly Lover's Fortress.
Fast Food	Escort the Quiet One in under two minutes.
Guest Book	Find all lore notes in The Ashes of Sker Hotel.
Hard Times at Lavernock	Complete Cursed Lands of Lavernock on Hard Difficulty.
Hard to Love	Complete Deadly Lover's Fortress on Hard Difficulty.
Hardcore Sewer Rat	Complete Sewers of the Dead on Hard Difficulty.
Hotel of Hard Knocks	Complete The Ashes of Sker Hotel on Hard Difficulty.
Inn and Out	Complete The Ashes of Sker Hotel under 25 minutes.
Lamb-baah-ghini	Escort the Lamb to slaughter in under two minutes.
Last Rites	Defeat Abraham.
Lavernock Rambler	Visit every location in the Cursed Lands of Lavernock.
Live, Laugh, Love	Complete "Gates of the Damned Part I" without receiving damage.
Love Letters	Find all lore notes in Deadly Lover's Fortress.
Maids of Lavernock	Find all the dolls in Lavernock.
Maids of Sker	Find all the dolls in Sker Hotel.
Maids of the Dead	Find all the dolls in Sewers of the Dead.
Maids of the Fortress	Find all the dolls in Deadly Lover's Fortress.
Miracle Man	Get a Miracle to Legendary.
Nightmare in the Lands of Lavernock	Complete Cursed Lands of Lavernock on Nightmare Difficulty.
Nightmare of Sker Hotel	Complete The Ashes of Sker Hotel on Nightmare Difficulty.
One Night Stand	Complete Deadly Lover's Fortress under 35 minutes.
Perkalicious	Have all the perks activated at once.
Radio Silence	Complete the radio tower objective without receiving damage.
Ramblings of a Madman	Find all lore notes in Cursed Lands of Lavernock.
Rat Race	Complete Sewers of the Dead under 35 minutes.
Ritual of the Nightmare	Complete all levels including the Hidden objectives on Nightmare.
Room Service	Visit every location in The Ashes of Sker Hotel.
Round Robin	Survive Round 50.
Rounded Experience	Survive Round 35.
Run Forest! Run!	Complete Cursed Lands of Lavernock under 30 minutes.
Secret Lover	Complete the hidden objective in Deadly Lover's Fortress.
Sewer Rat	Visit every location in the Sewers of the Dead.
Sewers of Nightmare	Complete Sewers of the Dead on Nightmare Difficulty.
Short Round	Survive Round 20.
Silence of the Lamb	Complete the hidden objective in Cursed Lands of Lavernock.
Speed Dating	Complete the "Weird Science" objective in under four minutes.
Stranger Thing	Defeat The Stranger.
That's Rank	Rank a gun to max level.
The Lambyrinth	Escort all Lambs in under five minutes.
What's Dead Should Stay Dead	Complete the hidden objective in Sewers of the Dead.