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.
Unlock all Follower Skins.
Unlock all tarot cards.
Unlock all fleeces.
Defeat the One Who Waits.
Gain 20 Followers.
Defeat Shamura.
Beat Shamura without taking damage.
Defeat all opponents in Knucklebones.
Find all 5 locations.
Beat Kallamar without taking damage.
Cook a Follower meat meal.
Defeat Kallamar.
Have 666 gold coins.
Unlock all curses.
Unlock all weapons.
Fully Upgrade Cult.
Beat Leshy without taking damage.
Unlock all doctrines.
Defeat Heket.
Beat Heket without taking damage.
Take confession.
Unlock a new fleece.
Gain 10 Followers.
Catch 1 of every fish.
Sacrifice a Follower.
Salvation awaits the fallen soul.
Reignite the lighthouse.
Defeat Leshy.
A new world awaits.
Win a game of Knucklebones.
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.
Have 12 Disciples.
Unlock all lore.
Unlock all outfits.
Completely Upgrade the Temple.
Hatch 5 eggs.