Here is the full list of all 53 Mystic Saga achievements.
Explored: Swamp
Collections completed
Interactions with Monk
Amulets used
Explored: Temple
Interactions with Tiger
Explored: Huntress's Lodge
Crystals spent
Coins spent
Tea Ceremony Collection complete
Interactions with Sage
Items bought
Interactions with Wolf
Chests opened
Interactions with Merchant
Explored: Library
Tools used
Energizers used
Failed explorations
Locations explored in silhouettes mode
Energy spent
Locations explored in night mode
Rewards received
Explored: Market
Level reached
Energy increased to
Quests completed
Interactions with Stableman
Locations unlocked
Explored: Smithy
Locations explored
Explored: Cabin
Interactions with ghost
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: Cavern
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