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