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