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Book of Yog Idle RPG
The Book of Yog is a 3D idle RPG game presented with a Cel-Shading art style. You can rally heroes, develop the kingdom and explore the secrets of a lost world. Dozens of heroes, hundreds of skills, thousands of loot for you to combine freely. Come to embark on a journey to build the strongest team!
What players say
Steam review score and the most-helpful voices, which may include critical ones. Data as of 2026-05-20.
“good game for the second monitor”
— a player, Steam review · 133 hrs played“good idle, chilling game with beautiful waifu”
— a player, Steam review · 1,738 hrs played“barely any of the outfits have the mindblowing stocking physics + heavy reliance on machine translated voicelines and text”
— a player, Steam review · 0 hrs playedPlayer activity
Monthly average concurrent players. Live count fetched 2026-07-24 00:51 UTC · history via SteamCharts.
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.
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 Notes of July 8
Dear Commander: We plan to start update maintenance at 15:00, July 8 (UTC+8). The maintenance is expected to take 180–240 minutes. This is a mandatory update. Please update the client to the latest ve
Server Upgrade & Purchase Refund Announcement
Dear Players: Due to the growing load pressure on some servers, we have successively carried out server architecture upgrades and data migrations. During this process, due to differences in historical
Patch Notes of June 26
Dear Commander: We plan to start update maintenance on 15:00, June 26 (UTC+8). The maintenance is expected to take 120 - 240 minutes. After the update, the Leafbound Sachet avatar frame will be distri
Patch Notes of June 10
Dear Commander: We plan to start update maintenance on 15:00, June 10 (UTC+8). The maintenance is expected to take 120 - 240 minutes. *Please pay attention to the community and in-game rolling announc
Academy Gifts Upgrade Notice
Dear Commanders, We are planning to upgrade Academy Gifts following the version update on June 10. The maximum Academy Gifts level will be increased from 18 to 36, with new rewards including Moonlight
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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 | Action, Adventure, Casual, Indie, Massively Multiplayer, RPG, Strategy, Free To Play |
| Player tags | Adventure · Massively Multiplayer · Nudity · Action-Adventure · Singleplayer · Action RPG · Action · Female Protagonist · Story Rich · Rogue-like · Multiplayer · Auto Battler (SteamSpy community voting) |
| Features | Single-player · Multi-player · MMO · In-App Purchases |
| Languages | English, Simplified Chinese |
| Estimated owners | 200,000 – 500,000 (SteamSpy) |
Minimum system requirements (PC)
Minimum: OS *: Windows 7, Windows 8, Windows 10 Processor: Intel Core-i3 or faster processor Memory: 4 GB RAM Graphics: any type DirectX: Version 9.0 Storage: 400 MB available space Sound Card: any type