Full list of all 48 Cult of the Lamb achievements. It takes around 15-20 hours to unlock all of the achievements in the base game on Windows.
The base game contains 37 achievements, and there are 2 DLC packs containing 11 achievements.
No longer a servant, no less than a God.
Sacrifice 10 Followers.
Defeat the One Who Waits.
Unlock all Follower Skins.
Unlock all tarot cards.
Unlock all fleeces.
Defeat Shamura.
Beat Shamura without taking damage.
Defeat all opponents in Knucklebones.
Find all 5 locations.
Beat Kallamar without taking damage.
Beat Heket without taking damage.
Have 666 gold coins.
Beat Leshy without taking damage.
Sacrifice a Follower.
Unlock all weapons.
Defeat Kallamar.
Unlock all doctrines.
Fully Upgrade Cult.
Unlock all curses.
Take confession.
Gain 20 Followers.
Unlock a new fleece.
Catch 1 of every fish.
Defeat Heket.
Gain 10 Followers.
Reignite the lighthouse.
Defeat Leshy.
Win a game of Knucklebones.
A new world awaits.
Cook a Follower meat meal.
Salvation awaits the fallen soul.
Gain 5 Followers.
Let the Word be known.
Defeat the first mini-boss.
The first devotee to the Cult of the Lamb.
A deal that cannot be undone.
Collect all Relics.
Complete a row in Purgatory.
Get your Gold back from Midas.
Completely Upgrade the Temple.
Have 12 Disciples.
Unlock all lore.
Unlock all outfits.
Hatch 5 eggs.