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About Book of Yog Idle RPG
Book of Yog Idle RPG lets players recruit heroes, build a four-member squad and explore an idle action-RPG world. As commander of the Arkrance Strike Force you gather Black Guard heroes, defend the Arkrance Great Wall and uncover the mystery behind the Black Tide. The game runs while you are offline, letting progress continue without constant battles.
The title offers dozens of heroes across six classes, a strategic talent system, random loot, and a sandbox construction mode that is still in development. It is free-to-play, supports single-player and multiplayer, and is available on Windows.
01 / THE GUIDE
Idle System
The core of the game is its idle ARPG mechanic. Players can make progress even when they are not actively playing, removing the need for repetitive combat. This design lets you grow your team at a personal pace without wasting time on meaningless battles.
Because the game continues offline, your team can keep advancing while you are away. The system is intended to keep advancement steady without requiring constant input.
- Check the offline progress timer regularly to see how much growth you earned while away.
- Balance active play with idle time to ensure you have enough resources for upgrades.
02 / THE GUIDE
Hero Recruitment
Early access provides 30 recruitable heroes, with more planned for later updates. Heroes belong to six distinct classes—Warriors, Tanks, Rangers, Assassins, Mages and Support—each with its own class system and talent trees.
Recruiting expands your options for team composition and strategic depth, as each class brings unique abilities and growth paths.
- Experiment with different class combinations to discover synergistic effects.
- Focus on filling talent trees early to unlock class-specific advantages.
03 / THE GUIDE
Strategy System
The game features an in-game strategic system that lets you customize items, skills and talents freely. Skill tomes can be collected and combined to shape each hero's skill tree, allowing for personalized combat strategies.
Strategic depth comes from mixing talent choices, equipment and hero roles to create a team that can handle varied challenges.
- Collect a variety of skill tomes to keep your options open for future builds.
- Regularly review talent allocations to adapt to new content or enemies.
04 / THE GUIDE
Team Formation
A squad consists of four Black Guard heroes. Different combinations trigger unique synergistic effects, meaning a team of four tanks can be as viable as a mixed lineup.
Team composition directly influences combat outcomes, encouraging players to experiment with role balance and synergy.
- Try forming homogeneous teams to test specific synergy bonuses.
- Swap heroes after major updates to see if new synergies emerge.
05 / THE GUIDE
RNG and Loot System
Exploration of wilderness, battlefields and dungeons yields randomly generated loot, skill tomes, materials and even heroes. Each battle can provide an unexpected reward, adding variety to each encounter.
The loot system is designed to be accessible; items can be earned through normal gameplay without a pay-to-win model.
- Participate in varied battle types to increase the diversity of loot you receive.
- Keep an eye on rare loot drops after boss encounters for valuable upgrades.
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