Arguably the best part of Portal was the closing song, written by musician Jonathan Coulton. In a new interview Valve founder Gabe Newell suggested that the sequel could make use of Coulton's musical stylings as well.

When asked by 1UP to provide a "one piece of trivia" about Portal 2, Newell replied: "Jonathan Coulton is awesome -- he's just brilliant; he's a joy to work with." 1UP asked if that meant a new song was in the works, and Newell simply reiterated that Coulton is brilliant.

"Still Alive", the song from Portal, was popular enough to get added to Rock Band. While it's going to be tough to duplicate that sort of popularity, you have to expect an attempt.