Here is the full list of all 25 Dark Heritage: Guardians of Hope achievements. It takes around 2-3 hours to unlock all of the achievements on Windows.
Find the Philosopher Stone
Finish all minigames without skipping
Complete all Hidden Object Scenes without using hint
Find 3 Hidden Objects in less than 3 seconds
Defeat Grand Master
Save Teacher
Ride down the mine
Read all the notes placed in the game
Save Fireman
Save Widow
Find 4 mysterious scrolls
Watch the first 10 cutscenes
Save Fisherman
Finish any Hidden Object Scene in less than 1 minute
Save fishes
Complete one puzzle with less then 5 mistakes
Finish three minigames in a row without skipping
Travel to Cannon Rock
Use cradle
Find mysterious scroll
Finish a minigame in less than 1 minute
Complete any Hidden Object Puzzle without using hints
Find all mysterious scrolls
Finish the game in Expert mode
Unlock all the other Achievements