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