Movie music has long been featured in the concert hall, with the lush scores of John Williams and the jazzy instrumentals of Henry Mancini dovetailing nicely with much of the classical repertoire. But video game scores? Believe it or not, game companies are hiring composers to write serious music for their epic adventures, and orchestras are beginning to program them. Is it a gimmick designed to attract new audiences? Sure. Does the score to Final Fantasy VI stack up to Beethoven? No. But the concerts have been a hit, especially with young people, and no one needs to tell American orchestras how hard it is to snare that particular demographic…