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