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.
Sacrifice 10 Followers.
Unlock all tarot cards.
Unlock all Follower Skins.
Unlock all fleeces.
Defeat the One Who Waits.
Defeat all opponents in Knucklebones.
Beat Shamura without taking damage.
Defeat Shamura.
Find all 5 locations.
Take confession.
Beat Kallamar without taking damage.
Cook a Follower meat meal.
Gain 20 Followers.
Unlock all weapons.
Unlock all curses.
Defeat Kallamar.
Fully Upgrade Cult.
Have 666 gold coins.
Beat Heket without taking damage.
Unlock all doctrines.
Defeat Heket.
Catch 1 of every fish.
Unlock a new fleece.
Salvation awaits the fallen soul.
Sacrifice a Follower.
Reignite the lighthouse.
Gain 10 Followers.
Beat Leshy without taking damage.
Defeat Leshy.
Win a game of Knucklebones.
A new world awaits.
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.
No longer a servant, no less than a God.
Collect all Relics.
Get your Gold back from Midas.
Complete a row in Purgatory.
Unlock all lore.
Unlock all outfits.
Have 12 Disciples.
Completely Upgrade the Temple.
Hatch 5 eggs.