Shenmue is a 1999 open-world adventure video game developed by Sega AM2 and published by Sega for the Dreamcast, produced and directed by Yu Suzuki. Suzuki coined a genre title, "FREE" (Full Reactive Eyes Entertainment), for the game, based on the interactivity and freedom he wanted to give to the player. Suzuki intended to achieve this by simulating aspects of real life through the game, such as the day/night/sleep system, real time variable weather effects (unheard of in a game of this kind at the time), fully voiced non-player characters with their own daily schedules, quick time events, and various other interactive elements such as vending machines, arcades, and convenience stores.
Shenmue borrows gameplay elements from several different genres, but largely consists of open-world adventure segments with real-time 3D battles interspersed throughout. It was the most expensive video game in its time, with a production cost of $47 million, equivalent to $64 million in 2011.