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