Here is the full list of all 90 Coin Crypt achievements.
Donate $500 total to Ouguiya
Beat 3 Old Explorers
Find 3 Cryptcoins
Get to world 3 in the crypts
Attempt 50 runs
Donate $500 total to Frank
Beat 3 Grandmas
Donate $500 total to Loonie
Beat the Queen
Get the Gods' reward
Discover 30 types of enemies
Enter the Crypts
Get to world 2 in the crypts
Beat 3 Undeads
Find 50 Doubloons
Find 20 Bramble Pieces
Discover 80 coins
Beat 3 Piggy Banks
Beat the Ghost King
Earn $15,000 in a single run
Donate $500 total to Bullion
Unlock 9 classes
Beat 3 armors
Beat the Mega Ectoplasm
Get to world 3
Beat 3 Rogues
Beat 3 Ectoplasms
Beat 3 Musicians
Get to world 2
Clear the first level
Beat the game with 10 classes
Unlock all classes
Climb the mountain 10 times
Beat all 3 secret bosses and finish a run
Enter the forge
Get to the bottom of the mountain
Beat the forge 10 times
Discover all coins
Discover all enemies
Donate $500 total to Sacagawea
Donate $500 total to Kaichin
Donate $10,000 total to deities
Find 7 Chaos Chips
Find 10 hidden chests
Beat 3 Cardinals
Beat a Corruptor
Beat the Gold Idol
Beat the Tycoon
Beat the Lootmaster
Beat the Sorceress
Beat the Archbishop
Beat the Shadomega
Beat Bullion
Beat Sacagawea
Beat Kaichin
Beat Ouguiya
Beat Loonie
Beat Frank
Beat the game with every class
Collect all secrets
Gain entry to Sky World
Gain entry to Sea World
Unlock ALL classes
Donate $500 total to Rubo
Use 10 wishing wells
Get 10 ghost blessings
Give 10 status effects to enemies
Earn $25,000 in one run
Find 5 secret chests in crypts
Deal 200 or more damage in a single strike
Have your maximum HP exceed 30
Win a run without dealing any damage
Defeat 3 Angels
Defeat 3 Swabbie Spirits
Defeat 3 Lost Kids
Defeat 2 Anubises
Defeat 2 Prodigies
Defeat EVERY enemy
Collect EVERY coin
Beat the game with EVERY class
Collect ALL secrets