Library of Ruina

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Library of Ruina
Developer(s)	Project Moon
Publisher(s)	Project Moon (PC, XONE) Arc System Works (NS, PS4)
Platform(s)	Windows Xbox One Nintendo Switch PlayStation 4
Release	Windows, Xbox One August 10, 2021 Nintendo Switch, PS4 April 25, 2024
Genre(s)	Role-playing, deck-building, visual novel
Mode(s)	Single-player

Library of Ruina is an indie deck-building turn-based role-playing game developed and published by South Korean studio Project Moon. Initially released for Windows and Xbox One on August 10, 2021, it is a direct sequel to the 2018 PC game Lobotomy Corporation.

The game generally received positive reviews for PC, but mixed to negative reviews on console. A sequel, Limbus Company, was released in 2023 for Windows, iOS, and Android devices. The side story light novel The Distortion Detective^[1] takes place during the events of Library of Ruina. Another light novel, Leviathan,^[2] was illustrated as a comic, taking place between Library of Ruina's true ending and the start of Limbus Company.