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Library Of Ruina
"May you find your book in this place." Combat between the guests and the librarians breaks out as if it were on a stage. Defeated guests turn into books, and the Library grows onward. And eventually, get your hands on… The one singular, perfect book.
What players say
Steam review score and the most-helpful voices, which may include critical ones. Data as of 2026-05-20.
What reviewers agree on
45 of the 100 reviews raise this.
“The game is freaking great, love the ost and the story, but holy crap WHAT IS THAT URBAN NIGHTMARE DIFFICULTY SPIKE (it's not even about the receptions, they are fine, even distorted philip's 1 hour fight, the…”
“The gameplay has a lot of depth. The difficulty spike is not just "vertical" it's just uneven (sometimes it's vertical sometimes it even goes down, at least until late-game). The story is incredibly good although the…”
“i hate card games but i continued to watch the story but my god this is the most boring annoying game i have ever played , i would just watch the story in youtube”
42 of the 100 reviews raise this.
“The gameplay has a lot of depth. The difficulty spike is not just "vertical" it's just uneven (sometimes it's vertical sometimes it even goes down, at least until late-game). The story is incredibly good although the…”
“Started playing the game because of Gebura. Stayed because of Malkuth. I uhhhh...... spent alot of time in this game. I finished all of urban nightmare without mods. Then the grind got harder in getting combat pages &…”
“After playing Limbus Company last year, I decide to give Library of Ruina a try, and after 76 hours of playing, i can confidently say that this is a genuinely great game. A fun, but complicated deck building game that…”
15 of the 100 reviews raise this.
“Library of Ruina is one of THE BEST, if not the best card games in gaming history. It is VERY challenging, but is rewarded with a great story. Trust me, play the game and READ the dialogue!!!”
“I’d recommend either playing Lobotomy Corporation first or watching a story video over it to know what’s going on. Anyways, Library of Runia is a great game with a great story. The combat is enjoyable for the most part,…”
“What I love most about this deckbuilder is that there are fights that are more like puzzles, i.e. the abnormalities often have unusual abilities that make unusual cards strong, so you have to do more than just get a…”
14 of the 100 reviews raise this.
“The game is freaking great, love the ost and the story, but holy crap WHAT IS THAT URBAN NIGHTMARE DIFFICULTY SPIKE (it's not even about the receptions, they are fine, even distorted philip's 1 hour fight, the…”
“has Roland in it, plus a great story, the gacha system rewards you for winning allowing you to make builds without having to do a ♥♥♥♥ ton of pulls or mirror dungeons (not trying to say limbus is a bad game, prob the…”
“One of the greatest stories and experiences I've played in a long, long time. I like the aesthetic of this game, Its got good art, music, snappy sound effects, and the lore can hit hard at times. love Binah She's got…”
7 of the 100 reviews raise this.
“After playing Limbus Company last year, I decide to give Library of Ruina a try, and after 76 hours of playing, i can confidently say that this is a genuinely great game. A fun, but complicated deck building game that…”
“One of the greatest stories and experiences I've played in a long, long time. I like the aesthetic of this game, Its got good art, music, snappy sound effects, and the lore can hit hard at times. love Binah She's got…”
“Absolute peak. Game gets hard tho, but good story, and decent enough graphics.”
30 of the 100 reviews raise this · 30 of them still recommend the game.
“The game is freaking great, love the ost and the story, but holy crap WHAT IS THAT URBAN NIGHTMARE DIFFICULTY SPIKE (it's not even about the receptions, they are fine, even distorted philip's 1 hour fight, the…”
“The gameplay has a lot of depth. The difficulty spike is not just "vertical" it's just uneven (sometimes it's vertical sometimes it even goes down, at least until late-game). The story is incredibly good although the…”
“has Roland in it, plus a great story, the gacha system rewards you for winning allowing you to make builds without having to do a ♥♥♥♥ ton of pulls or mirror dungeons (not trying to say limbus is a bad game, prob the…”
12 of the 100 reviews raise this · 7 of them still recommend the game.
“i hate card games but i continued to watch the story but my god this is the most boring annoying game i have ever played , i would just watch the story in youtube”
“Okay so this game is pretty good. I give is a 7 or 8 out of 10. It took me about a year to beat it on account that I have a job and other responsibilities. The character writing is overall fantastic, the storytelling is…”
“The game itself is absolutely amazing, but THE SWEEPERS ♥♥♥♥♥♥♥ SUCK.”
6 of the 100 reviews raise this · 6 of them still recommend the game.
“Started playing the game because of Gebura. Stayed because of Malkuth. I uhhhh...... spent alot of time in this game. I finished all of urban nightmare without mods. Then the grind got harder in getting combat pages &…”
“FINISHED THE GAME AND I loved IT. Shoutout opwnso for gifting me this game starts off smooth for a bit then you just get ass ♥♥♥♥♥♥ out of nowhere (truly vertical). Spent most of my hours just replaying fights to get…”
“this isnt gonna be a long review,but for me?,this game deserves the title of (my) fav game oat,and ive played peak games to,but this game stunned me,but aside from bias,i'll say this game barley makes it to 8.5/10,this…”
4 of the 100 reviews raise this · 3 of them still recommend the game.
“The gameplay has a lot of depth. The difficulty spike is not just "vertical" it's just uneven (sometimes it's vertical sometimes it even goes down, at least until late-game). The story is incredibly good although the…”
“this game made me hate birds I do recommend completing the true ending of lobotomy corporation before playing, as the game constantly spoils the ending to lobcorp”
“Library of Ruina: What an interesting game. It's a lot to unpack, especially right after finishing it. I've watched PNGs clash with each other for a hundred hours, and I felt oddly amazed. There is a lot to love and…”
Counted across 100 English reviews, sampled to match this game's 94.1% positive rating · as of 2026-05-20
“this has some of the worst gameplay sections I've seen in ANY card-builder game (Keter and Chesed realization are some of the worst experiences I've had in a game, like EVER) because you spend about 30 hours getting to know how the game operates for it to throw it out of the…”
— a player, Steam review · 81 hrs played“I beg you to go in blind. I consider myself an avid reader, I am always looking for novels that challenge my world view, but I did not expect this game to best any novel I've read. The way project moon writes humans is truly something else, they represent the struggle, the love,…”
— a player, Steam review · 178 hrs played“It's peak. just Peak One of, if not the best Project Moon game. But they're all peak. Pros Limbus company but more skill rewarding No Winrate Cons vertical difficulty spike No Winrate”
— a player, Steam review · 34 hrs playedPlayer activity
Monthly average concurrent players. Live count fetched 2026-07-11 13:28 UTC · history via SteamCharts.
Achievement stats
Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-07-25.
Price tracking
US-region pricing (USD), sampled twice daily by our own tracker since 2026-07-11. Steam prices vary by region — always confirm your local price on Steam.
Regional prices at last sample, in local currency — Steam sets each region's price independently.
Cheapest → most expensive, converted to USD at ECB reference rates (2026-07-24). Relative comparison only.
Latest official news
Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.
Patch Note ver 1.1.0.6a12
Fixed an issue where certain poses would display erroneous images when using the Key Pages of Yun, Pameli, Zulu, and Mei or their projected appearance. Fixed an issue where the body image of custom sk
Patch Note ver 1.1.0.6a10
Fixed an issue where certain battle dialogue for various enemies was missing. When the game is launched with an abnormally small or erroneous window size, the window will automatically adjust to an in
The 'Library Of Ruina' artbook now supports simplified Chinese!
The 'Library Of Ruina' artbook now supports simplified Chinese! A simplified Chinese version of the artbook has been added. You can download the artbook in English, Korean, Japanese, and simplified Ch
Patch Note Ver 1.1.0.6a3
Added a 'refersh' button to the custom invitation tool, which reloads external resources. Fixed an issue where passive ability descriptions of certain enemies were not visible. Fixed an issue where pr
Patch Note 1.1.0.6 - Notice of Update to the Custom Reception Creation Tool
The custom reception creation tool has been updated. Please refer to the manual for detailed instructions on modding. You can find the manual through the links below. https://docs.google.com/presentat
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Screenshots
Official Steam store screenshots — click any shot to enlarge.
Facts & details
From the Steam store record, snapshot 2026-05-20.
| Genres | Indie, RPG, Strategy |
| Player tags | Story Rich · Card Game · Strategy · Difficult · Deckbuilding · Turn-Based Combat · Great Soundtrack · Singleplayer · Psychological Horror · Indie · Visual Novel · Gore (SteamSpy community voting) |
| Features | Single-player · Steam Achievements · Steam Workshop · Partial Controller Support · Steam Cloud · Remote Play on Tablet · Family Sharing |
| Languages | English, Japanese, Simplified Chinese, Korean * * |
| Achievements | 76 |
| Estimated owners | 1,000,000 – 2,000,000 (SteamSpy) |
| Official site | https://twitter.com/ProjMoonStudio |
Minimum system requirements (PC)
Minimum: Requires a 64-bit processor and operating system OS *: Windows 7 Processor: Intel Core i5 Memory: 8 GB RAM Graphics: GeForce GTX 560+ DirectX: Version 10 Storage: 10 GB available space