With a diverse professional profile spanning more than a decade, he has worked as a writer, film maker, musician, and game designer. As an employee of Ubisoft, McDevitt has been the script writer for both the story and dialogue in Assassin's Creed: Bloodlines, Assassin's Creed II: Discovery, Assassin's Creed: Revelations, Assassin's Creed: Embers and Assassin's Creed IV: Black Flag.