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