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