Here is the full list of all 53 Beautiful Mystic Survivors achievements.
Evolve Shield 3 times
Craft 200 potions with Sophia
Win 5 times
Defeat 400,000 enemies
Defeat level 2 final boss
Defeat 200,000 enemies
Walk 10,000 meters with the Fire Boots
Defeat 100,000 enemies
Complete 6 secret shrine or cursed shrine challenges
Complete 3 secret shrine or cursed shrine challenges
Rescue Melisandre
Collect 4,000 gold during a single run
Pickup 30 healing potions
Defeat the first boss of level 1 3 times
Complete secret shrine or cursed shrine challenge
Survive 16 minutes with Ciara
Pickup 100 items from the ground
Defeat 20 elite enemies with the Scythe
Pickup 50 items from the ground
Collect 2,000 gold during a single run
Pickup 10 healing potions
Use special abilities 100 times
Collect 5,000 gold in total
Defeat level 2 final boss 2 times
Defeat level 1 final boss
Reach level 60
Pickup 10 items from the ground
Rescue Ciara
Collect 1,000 gold during a single run
Level up the Holy Pedant to level 4
Equip 6 passive items in a single run
Obtain 3 legendary weapons
Obtain a legendary weapon
Defeat the first boss of level 2
Defeat the first boss of level 1
Defeat a final boss with Rosaline
Use special abilities 50 times
Evolve the Bow
Evolve the Sword
Survive 5 minutes with any character
Survive 16 minutes with Cassandra
Survive 16 minutes with Rosaline
Survive 16 minutes with Isaya
Equip 6 weapons in a single run
Defeat level 2 final boss 3 times
Defeat a final boss with Isaya
Defeat a final boss with Cassandra
Defeat a final boss with Ciara
Win the first level with 3 different characters
Use special abilities 250 times
Rescue Minos
Beat level 3 with Minos
Kill 5000 enemies with Minos' active ability