Library of Ruina has been officially recognized by Guinness World Records for having the longest video game campaign or story, with an estimated main campaign completion time of 113 hours. The turn-based, deck-building RPG developed by Project Moon surpassed the previous record holder, Persona 5 Royal, by approximately 12 hours.
Guinness World Records lists the achievement as of June 2026, while Project Moon publicly celebrated the recognition on October 27. The record specifically concerns the estimated time required to complete a game’s main campaign rather than the total time needed to finish every optional activity.
According to the official Guinness World Records listing, Library of Ruina’s main story takes approximately 113 hours to complete, compared with roughly 101 hours for Atlus’ Persona 5 Royal. That puts Project Moon’s RPG ahead of a title already widely known for its lengthy narrative and substantial campaign.
However, the 113-hour figure is an estimate, not a fixed requirement for every player. Individual completion times can vary depending on familiarity with the battle mechanics, difficulty encountered and time spent preparing for encounters. Guinness does not publicly explain the methodology or data sources used to calculate the record, making it difficult to establish precisely how other lengthy games were evaluated.
Released in 2021, Library of Ruina combines turn-based combat with deck-building mechanics. Players manage a mysterious library, invite guests into battles known as Receptions and collect books through successful encounters. Combat involves assembling decks, managing character abilities and developing strategies against increasingly challenging opponents.
The game is a direct sequel to Project Moon’s 2018 management simulation Lobotomy Corporation, expanding on the fictional setting and narrative established in that title. The developer later released Limbus Company in 2023, another RPG set within the same broader universe.
Library of Ruina is available on PC through Steam, as well as PlayStation, Nintendo Switch and Xbox platforms.
The Guinness recognition also highlights the distinction between main-story completion times and broader estimates of game length. For comparison, the estimated 14–16-hour campaign for Tomb Raider: Legacy of Atlantis illustrates how considerably story lengths can differ between genres.
Although Library of Ruina now holds the Guinness title, the record should not be interpreted as proof that no other video game requires more than 113 hours to finish. Some games have longer reported playtimes, particularly simulations, idle games and continuously updated titles. The official listing establishes Library of Ruina as the recognized holder of the specific longest campaign or story category, without publishing a comprehensive comparison of every game.
For players considering Library of Ruina, the 113-hour estimate provides a useful indication of the commitment involved in finishing its main story, excluding the additional time potentially required for optional content and completionist objectives.
