Here is the full list of all 12 Faery - Legends of Avalon achievements. It takes around 12-15 hours to unlock all of the achievements on Windows.
You have defeated the giant crab and his sidekicks in the dragons' cave.
You have encountered all of Faery's inhabitants and you have spoken with all of them.
You have encountered all the Faery folk in all the worlds.
You have collected 60 items of equipment distributed around the Faery worlds.
You have fulfilled Oberon's first mission. You can now discover the other worlds.
You have restored magic to the Tree World and saved its inhabitants from corruption.
You have set the Flying Dutchman on its way and saved the magic in the world.
You have brought water to the sacred Scarabaeid and found its true path.
The Isle of Faeries holds no secrets for you now.
All inhabitants of the Tree World are now at peace thanks to your intervention.
You have put an end to the troubles of the inhabitants of the Flying Dutchman.
You have helped all the inhabitants of the City of Mirages.