George A. Romero's Night of the Living Dead series is a sprawling, multimedia franchise with numerous sequels, remakes, and off-shoots. The amount of projects to follow in the wake of Romero's seminal 1968 film, Night of the Living Dead, is perhaps unrivaled. It didn't just launch a franchise; it launched an entire genre. In fact, the franchise specific to Night of the Living Dead is so large, it could almost qualify as a genre on its own. Most people know Night of the Living Dead, Dawn of the Dead, and maybe even Day of the Dead, but the series goes much, much deeper than that.

https://screenrant.com/romero-living-dead-movies-franchise-sequels-remakes-explained/