First Release: Shenmue (1999, Dreamcast)
Last Release: Shenmue II (2002, Dreamcast/Xbox)
You don't leave your dedicated fanbase with a cliffhanger and expect people to be content. Shenmue did that when the second version came out and gamers have been begging for another entry since God knows when. This open world epic sported crisp graphics, a gripping narrative and plenty of gameplay options.
Fans miss Ryo. We've heard rumors for years now, surrounding another game in this series. Sega, you'd better make those rumors come true. Get at Yu Suzuki and make him churn out Shenmue 3!
Another one of these games could take what the Yakuza series has done and improve upon it in every way.