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