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