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