The .hack Series is a multimedia franchise created by Bandai Namco Entertainment that includes video games, anime, manga, and novels. It primarily revolves around a fictional MMORPG called .hack//The World, where players experience adventures and uncover mysteries within the game. The series explores themes of virtual reality, identity, and the impact of technology on society. The franchise began with the release of the .hack//Infection video game in 2002 and has since expanded to include several sequels and spin-offs. Key characters, such as Haseo and Tsukasa, navigate the complexities of the game world while dealing with real-life consequences, making the series a unique blend of storytelling and interactive entertainment.