Set after the events of the anime series. hack, which explores the mysterious origins of The World.
The games are part of a multimedia franchise called Project. hack//Liminality, the accompanying original video animation (OVA) series which details fictional events that occur concurrently with the games.
Each game comes with an extra DVD containing an episode of. Players may transfer their characters and data between games in the series. hack//Quarantine, all feature a ' game within a game', a fictional massively multiplayer online role-playing game (MMORPG) called The World which does not require the player to connect to the Internet. hack ( / d ɒ t h æ k/) is a series of single-player action role-playing video games developed for the PlayStation 2 console by CyberConnect2 and published by Bandai Namco Entertainment.