Review · Action · PlayStation 4 · Xbox One · Nintendo Switch
Book of Demons
Reviewed: 01 May 2026
PlayStation 4 · Xbox One · Nintendo Switch · PC
SONKA · 2018
Ludograph rating
B
Good
64 /100
Book of Demons is an action RPG that develops strategic thinking, adaptive challenge, and problem solving through card-based combat and dungeons.
Growth (BDS)
49
Risk (RIS)
6
Daily limit
120min
Age guidance
13+
Developmental benefits
| B1 | Cognitive | 0.74 | |
| B2 | Social-emotional | 0.03 | |
| B3 | Motor | 0.55 | |
Book of Demons offers significant cognitive benefits through its strategic card-based combat and procedurally generated dungeons, fostering problem-solving, strategic thinking, and adaptive challenge. The Flexiscope™ system promotes healthy play habits by allowing players to customize session length, making it accessible for short playtimes and preventing extended, unplanned sessions. Motor skills like hand-eye coordination and reaction time are also developed through its hack & slash gameplay.
Design risks
| R1 | Compulsion-loop pressure | 0.13 | |
| R2 | Monetization | 0.00 | |
| R3 | Social risk | 0.00 | |
Risks are minimal, with no monetization pressure, social risks, or significant compulsion-loop design. Content risks are moderate for violence and mild for suggestive themes and language, consistent with its Teen rating. The game's design actively mitigates engagement manipulation through its Flexiscope™ system.
Content (not in risk score)
| R4.1 | Violence Level | 0.67 | |
| R4.2 | Sexual Content | 0.33 | |
| R4.3 | Language | 0.33 | |
| R4.4 | Substance References | 0.00 | |
| R4.5 | Fear / Horror | 0.33 | |
Content risk is displayed separately and does not affect the time recommendation.
Regulatory design checks · DSA — Assessed: meets criteria·GDPR-K — Assessed: meets criteria·ODDS — Assessed: meets criteria
- DSA:What Ludograph checks: whether the game's design gives minors the transparency the EU Digital Services Act expects: plain terms, honest defaults, and clear reporting routes.: Estimated from review data. No dark pattern or child-targeting concerns found.
- GDPR-K:What Ludograph checks: whether age assurance and consent flows are designed for under-16s, in the spirit of GDPR Article 8.: Estimated from review data. No privacy or child-targeting concerns found.
- ODDS:What Ludograph checks: whether paid random-reward drop rates are disclosed, as required in China, Japan and South Korea.: Estimated from review data. No paid random-reward mechanics found, so drop-rate disclosure requirements do not apply.
These reflect Ludograph's assessment of the game's design practices against each framework's criteria, not a legal compliance determination.