Here is the full list of all 13 Legends of Amberland: The Forgotten Crown achievements.
Win the game (any difficulty).
Win the game on Hard or Insane difficulty.
Win the game in half a year (182 days).
Slayed a dragon (any).
Reach level 50 (any character).
Win the game without calling a griffin.
Learn the Secret of the Enchanted Forest.
Become disciples of all five masters.
Travel 2,000 squares by sea.
Find the Red Orb.
Find the Green Orb.
Find the Blue Orb.
Get approval of all members of the Wizard's Council.