While the first two entries on this list where games that were inspired by existing anime series, our next game series was planned simultaneously as both a PlayStation 2 video game series and a television series. The project we're referring to was called .hack and both the games and the TV program were set inside of a futuristic MMORPG. However the PS2 titles, of which there were four, were single-player action RPGs in which players assumed the role of Kite as he and his companions investigated to find the cause of a mysterious in-game event that would leave real-world players in a coma. In addition to an innovative concept, this underrated roleplaying game series also featured fun combat and addictive exploration of various levels. Since the release of the original games, .hack has expanded to include a sequel trilogy as well as manga books and more. Still, it is the original quartet of games, subtitled Infection, Mutation, Outbreak and Quarantine, that truly stand out.