Here is the full list of all 53 Mystic Saga achievements.
Explored: Cavern
Interactions with ghost
Failed explorations
Explored: Swamp
Interactions with Monk
Collections completed
Explored: Temple
Amulets used
Explored: Huntress's Lodge
Interactions with Tiger
Coins spent
Tea Ceremony Collection complete
Tools used
Interactions with Sage
Interactions with Merchant
Energizers used
Explored: Library
Energy spent
Locations explored in silhouettes mode
Chests opened
Crystals spent
Interactions with Wolf
Items bought
Rewards received
Locations explored in night mode
Explored: Market
Level reached
Energy increased to
Quests completed
Explored: Smithy
Interactions with Stableman
Locations explored
Explored: Cabin
Locations unlocked
Interactions with Spider
Interactions with Ice Dragon
Interactions with Woodsman
Interactions with Crane
Interactions with Sailor
Interactions with Sea Monster
Interactions with Bandit
Interactions with Dragon
Explored: Snow Fortress
Explored: Underwater City
Explored: Floating Islands
Explored: Mysterious Forest
Explored: Desert
Explored: Harbor
Explored: Palace
Elemental Keys Collection complete
Emperor's Dragons Collection complete
Imperial Regalia Collection complete
Fish Market Collection complete