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