Longest-running videogame series

The longest-running videogame series has existed for 51 years 145 days, and was achieved by The Oregon Trail, from its first release in 1971 to the latest in 2023.

The Oregon Trail was originally developed by Don Rawitsch, Bill Heinemann, and Paul Dillenberger as an educational, text-adventure game to teach school children about the realities of 19th Century pioneer life on the Oregon Trail. For the past 50 years, the game's concept has been iterated on and turned into graphically rich choose-your-own adventure style games. The latest iteration - The Oregon Trail: Boom Town - is a a free-to-play Farmville-like mobile game.