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