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