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