Boo first appeared in Baldur's Gate, the 1998 role playing game by BioWare, as the constant companion of the ranger Minsc. Minsc insists Boo is a miniature giant space hamster and often turns to him for counsel, interpreting each squeak as wise guidance, a running joke that made the pair fan favourites. Boo returned in sequels and later Baldur's Gate stories, cementing the squeak as shorthand for the duo. Online, fans isolate the sound for memes, streams and edits celebrating classic RPG nostalgia.