Here is the full list of all 20 Epic of Serinor: Dawnshadow achievements.
Escaped the Shadowed Vale
Reclaimed Syn's Shadowed Voice
Returned shell for the Time Bomb
Returned fuel for the Time Bomb
Returned time for the Time Bomb
Created eight wyrmsblood potions
Recruited a werewolf to Somber Tune
Recruited a grimling to Somber Tune
Recruited a bogling to Somber Tune
Commissioned a piece of Howling gear
Named a raptor ally
Gave a lizardman the power of the dragons
Convinced a werewolf to fight its maker
Returned the needle to the Eldritch One
Traveled Nilamaak's ways
Dedicated a shrine to the Abriasha
Played Kunago's song