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