VideoGamer.com reports: "During our visit to Rockstar's London HQ for a hands-on with 2008's biggest game, we asked a spokesperson how long it would take to finish the series' next-gen debut. The answer: about 100 hours, if you take your time.
"If you're not in a rush and you answer the phone when it rings it'll take about 100 hours to complete", we were told. "It's harder to distinguish between main and side missions - there are loads of both. But there are more main missions than side missions. It's not as clear cut as it used to be because of the phone.""