Here is the full list of all 37 Sakura Dungeon achievements.
Defeat 5,000 enemies.
Defeat 2,500 enemies.
Win the game on hard mode.
Win the game on abyssal mode.
Defeat Hiriko.
Find every outfit in the game.
Defeat Izanami.
Discover the fox girl's ship.
Recruit the Spirit Guardian into your party.
Defeat the dungeon lord.
Win your second battle against the succubus.
Recruit the Reaper Twins into your party.
Defeat Yomi.
Recruit Anubis into your party.
Step into the Abyss.
Defeat the reaper twins.
Recruit the Ryuuou into your party.
Acquire the warp gem.
Recruit the Sand Sentinel into your party.
Defeat 1,000 enemies.
Reassemble the state of Fortuna.
Give Anubis an offering of milk.
Collect 10 outfits for your wardrobe.
Recruit the Queen Bee into your party.
Avoid an assassination attempt.
Recruit the chocolate mimic into your party.
Make the observatory operational again.
Acquire the Dual-Soul ability for Yomi.
Recruit Captain Bonny into your party.
Recruit Maeve into your party.
Find all of the swimming wear outfits.
Acquire the Astral Blade skill for Ceri.
Use Yomi in your party.
Drive away the warrior from the shop.
Recruit Sylvi into your party.
Defeat the first floor guardian.
Clear the first floor of the dungeon.