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