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).
Win the game without calling a griffin.
Reach level 50 (any character).
Slayed a dragon (any).
Become disciples of all five masters.
Get approval of all members of the Wizard's Council.
Find the Red Orb.
Find the Green Orb.
Travel 2,000 squares by sea.
Find the Blue Orb.
Learn the Secret of the Enchanted Forest.