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