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