[quote name='PikaPichu']It sucks to hear that it sold so poorly though. The reviews for the game seemed alright. I thought it offered more of what people loved about PGR3. What went wrong?[/quote]
One thing was that they failed to live up to promises. When it was first announced, all the tracks were supposed to have all versions of different times of the day(morning, afternoon, evening, night). As they got closer to the release date, it was revealed that they had to cut back on that feature cause of the limits of the data on the DVD. That was one feature many people were hoping for.
As for other reasons, maybe like Gran Turismo, people are just looking for another racer. Maybe that's why Dirt sold so well?