PA writes: I knew Guitar Hero was special. I played the game for the first time at the manager’s conference for a large video game retailer, and I didn’t understand the controller for the first song. I did better on the second try, and I came close to a perfect score on my third. That first controller was bulky, and it gave only a few hints about what was to come, but it was like seeing Nirvana at a tiny club. You may not have known exactly what was coming, but you knew there was change in the air.