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