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