Library of Ruina

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.

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

A sequel titled Limbus Company was released in 2023 for Windows, iOS, and Android devices. The side story light novel The Distortion Detective takes place during the events of Library of Ruina. Another light novel, Leviathan, was illustrated as a comic. It takes place between Library of Ruina's true ending and the start of Limbus Company.

Gameplay

Reception

The titular Library is split up into ten floors, each starting with a number of librarians. As the player progresses through the game's storyline, they will gain access to more floors. On the top left side of the main menu, players can open a side tab where they can send an invitation, burn books, read Key page stories, and replay cutscenes and past Abnormality battles.

Invitations are how guests are brought to the Library for battles known as receptions. Before the start of each reception, players enter the preparation phase where they can change equipment and inspect opponents' stats, such as HP, Stagger Resist, resistance values, and equipment. A reception may span over multiple acts; players upon clearing an act will return to the preparation phase for the next act. Librarians' equipment cannot be changed in-between acts; they lose status effects that retain from the last act, but will keep their HP and Emotion level, and their Stagger Resist is recovered to full.

Library of Ruina's story is primarily shown in a visual novel format. Once a reception starts, the player will get a cutscene about the guests and their motivations for entering the Library, and another of Roland and Angela discussing guests and other specific characters after a reception ends.

Key and Combat pages

After clearing a battle, the player will receive books of the defeated enemies. Burning these books randomly gives the player Key pages and Combat pages, color-coded based on rarity and quantity.

Key pages serve as the game's "armor" and can be assigned to the librarians. Equipping one will give them unique stats, damage resistances, and passives. Key pages can only be obtained in limited amounts.

Combat pages are the game's "weapon" items, actively used to attack and defend in combat. Some Combat pages are unique to a specific character and their Key pages. Unlike Key pages, Combat pages are only limited by the amount a librarian can bring into battle (3 per page, 1 per an Objet d'art page), and thus has no limited capacity outside of receptions. Pages will have at least one offensive (attacking an enemy) or defensive (defending to reduce damage or dodging an attack entirely) die. The yellow-colored Counter dice are a special type of dice; they are played against an unopposed Combat page and can replay upon winning a clash until the unopposed Combat page ends. While most Combat pages are melee, there are ranged Combat pages that take action before Melee pages, Mass Attack pages that take first action regardless of Speed, and On Play pages that take effect immediately upon selection from hand.

The three types of damage in Library of Ruina are slash, pierce, and blunt damage. They deal both physical and stagger damage, affecting characters' HP and Stagger Resist respectively. If a character's stagger reaches zero, they will be unable to move the next turn and receive fatal damage from all attacks regardless of resistance. Characters will have different resistances and weaknesses based on their Key pages. For game progression purposes, players' Key pages may not share the same strengths or vulnerabilities with the characters as enemies.

Amount of damage received

Ineffective	Endured	Normal	Weak	Fatal
x 0.25	x 0.5	x 1.0	x 1.5	x 2.0

Combat

A screen shot depicting gameplay for Library of Ruina during a reception.

In battle, every character has dice and dots of 'light' (a form of combat stamina) above them. Upon starting the Scene, each dice will randomly roll a number or value. The amount determines a character's 'Speed', determining which character moves first. By hovering over an enemy's dice, the player will see an arrow pointing to one of their librarian's dice with the Combat page the enemy intends to use. Players can have a librarian with higher Speed redirect an attack meant for one of their other librarians.

The player needs to carefully manage available resources, namely 'light' and Combat pages, which return into the deck to be randomly picked upon usage. If the librarian's current Light is lower than the cost of any available Combat page, or if the librarian has no Combat pages to initiate action, they will be unable to act. Light points and Combat pages are naturally restored by one unit per turn or by raising the Emotion level of that character, which will restore all Light points.

When engaging an unstaggered opponent, characters will enter a clash where their page actions interact with each other. Two dice will roll and the highest value will act; in the event where both dice roll the same value, actions will be canceled out.

Emotion level is a mechanic that raises whenever a character wins or loses a clash, or when their dice rolls its maximum or minimum value. The group will gain an emotional level-up after their average emotion level reaches a certain point. When the emotion level rises, the player must choose one Abnormality page to apply to a librarian. Abnormality pages come in two colors, green (Awakening) and red (Breakdown), each with its own beneficial effects and drawbacks. The emotion level can rise up to five times per battle, with a total of six Abnormality pages to be picked.

Abnormality battles

Players can fight in Abnormality battles, boosting the respective floor's realization level and overall power. Many of the Abnormalities present in-game originate from Lobotomy Corporation. Every Abnormality battle has a certain gimmick or mechanic the player must figure out to defeat them. There is no cost to enter battle, and they can be retried an unlimited amount of times.

After completing an Abnormality battle, a new librarian will be unlocked for the floor. Including the Patron Librarian, five librarians in total will be available per floor. Players can customize a librarian's name, appearance, and combat dialogue. Completing Abnormality battles also grant Abnormality pages used in battles.

Floor realizations

After the player has completed all of the Abnormality battles on a floor, they can choose to begin the floor's Realization: a multi-segmented puzzle battle against Angela or Roland as they suffer from an emotional meltdown, taking after the floor's Abnormalities' appearances and abilities. Completing the Floor realization will grant E.G.O. pages exclusive to that floor. While not mandatory, only through completing all Floor realizations (with the exception of the Kether floor) can the player unlock the game's true ending.

Plot

Setting

Library of Ruina takes place in a dystopian world known as the City, which is made of twenty-six districts. The City is governed by the a reclusive organization known as the Head, while the Nests are run by Wings, mega-corporations that harness powerful technologies known as Singularities. The backstreets are crime-riddled areas controlled by various crime syndicates. Outside of the City are the Outskirts, a barren hell-like wasteland, and the Ruins, eldritch landscapes beyond the Outskirts.

Throughout the City, there are many offices run by Fixers, mercenaries regulated by the government. Each fixer is assigned a grade based on their skill and experience.

Following the events of Lobotomy Corporation, Angela creates the Library out of the light produced by Lobotomy Corporation's Seed of Light, creating an incident known as the "White Nights and Dark Days". This incident and its aftermath directly influence the game's plot.

Before Angela opens the Library, a low-level fixer named Roland appears in it and is forcefully recruited by Angela to be her guide to the City. Angela wishes to find the "one true book" that contains the answers she desires and turns her human. She sends out Invitations and has Roland and her other librarians battle the guests. If the guests win, they are allowed to take a book; if they lose, they become a book themselves.

Story

The player follows Angela's journey toward the "one perfect book" in the Library from the view of Roland, a Fixer who becomes her servant after trespassing into the Library uninvited.

The story is broken up into various chapters, and as each chapter concludes and another begins, Angela comes closer to becoming human while the Library becomes an ever-growing threat to the City, urging City Associations to take action. A mysterious Fixer known as Argalia recruits various characters for an unknown cause, while Olivier, Fixer of the Hana Association, attempts to assassinate Angela only to be stopped by Roland, who reclaims his gloves from Olivier and reveals himself as the Black Silence after defeating Olivier in a duel. Soon after, the syndicate Reverberation Ensemble led by Argalia breaks into the Library, scattering to the ten floors to claim the Light for their greatest performance that will overturn the City. The Library ultimately emerges victorious after a hard-fought battle.

Just as Angela finally gains a human body, Roland betrays Angela and reveals his true motive for coming to the Library: to make her suffer as revenge for her actions instigating the Distortion phenomenon, the Pianist's manifestation, and ultimately, the death of his wife. Despite transforming into multiple Distortions, Roland fails to defeat the Library and pleads for Angela to kill him, or he will kill her if she falters.

If all of Angela's Floor realizations have not been completed, she will kill Roland and the Librarians and obtain the one true book. Angela, burdened by the guilt of killing her friends and the city folk, continues her aimless destruction for 13 years before letting a nameless follower end her life. If all of Roland's Floor realizations have not been completed, Roland will swiftly behead Angela before returning to the City, his life spiraling into drug abuse and wanton slaughter before eventually dying in a gutter being impaled by numerous weapons from friends, foes, and strangers alike.

If all Floor realizations have been completed and Angela and Roland choose to forgive each other, Angela will release the culminated Light and resurrect all lives the Library has taken, kickstarting the Kether floor realization facing against Carmen, founder of Lobotomy Corporation's Seed of Light and actual mastermind behind the Distortion phenomenon. Meanwhile, Roland and the Library fight back the returned Reverberation Ensemble, now empowered by the Light, for 7 days; Roland saves Angela from dissipating inside the Light and deals the final blow to Argalia, killing him for good.

The Library soon receives the arrival of the Head, who aims to expel the Library from the City and to exterminate Angela. Facing great retaliation from Roland, Gebura, and Binah, the Head agents decide to instead stick to their main plan and expel the Library into the Outskirts. In the aftermath, Angela decides to reopen the Library under a new direction, redirecting her vengeance at the Head itself for perpetuating the cycle of misery.

Development

Music

Library of Ruina's soundtrack was created by two music studios, South Korean game sound studio Studio EIM and Japanese indie band Mili. Studio EIM composed music for the general guest battles including the floor, abnormality, and realization themes. The background music changes throughout a battle rising with the emotion level. Mili made a mini album, To Kill A Living Book, with seven out of the eight songs being tailored to specific characters. The eighth song in the album, Salt, Pepper, Birds, and the Thought Police is not a part of the official soundtrack. The first song, String Theocracy, is Library of Ruina's opening theme song.

Release

Library of Ruina was initially released for Windows via Steam's early access program on May 15, 2020, before being fully released for both Windows and Xbox One on August 10, 2021. Versions for Nintendo Switch and PlayStation 4 were made available via publisher Arc System Works nearly three years later on April 25, 2024.

Reception

Xbox Hub writer Richard Barker praised the compelling nature of the game's narrative while panning its obfuscation of battle mechanics.

Nintendo Life echoed similar sentiments in their review, scoring it a 4 out of 10.