From all the evidence, I think it appears as if the adventurer came from a family of traveling performers or something of the like. Think the old stereotype of gypsies.
They traveled the kingdoms of runescape, sticking mostly to Saradominist regions, hence the player's inherent Saradominism. Lumbridge was the city they stopped in most often, hence the Lumbridge connection. The adventurer was the musician of the group, playing the small piano they took in one of their carts. All the traveling game him his taste for adventure, and perhaps his brother was a sort of puzzle-master, giving brain-benders to all the audience and giving the adventurer a taste for puzzles.
However, something went wrong in the camp. It may or may not have been the adventurer's doing, but whatever it was, it forced him to flee. As he headed for an island escape, his boat crashed and his head was hurt, causing the amnesia that made him forget how to do everything. All he remembered was the alias he had chosen to escape his past, though in time he gradually got back details of his old life that are mentioned in quests.
Anyway, that's the story I've pieced together from all this. Awesome thread.
15-Jun-2013 14:29:21