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