Review · Adventure · PC
DUSK INDEX: GION（ダスクインデックスギオン）
Reviewed: 07 Jun 2026
PC
mebius. · 2026
Ludograph rating
Growth (BDS)
40
Risk (RIS)
2
Daily limit
–
Age guidance
17+
Developmental benefits
| B1 | Cognitive | 0.62 | |
| B2 | Social-emotional | 0.23 | |
| B3 | Motor | 0.10 | |
DUSK INDEX: GION offers a rich, narrative-driven experience that engages players in complex problem-solving, critical thinking, and memory retention as they unravel a time-crossing murder mystery. Its visual novel format promotes strong reading and language skills, while the intriguing plot encourages learning transfer between different timelines.
Design risks
| R1 | Compulsion-loop pressure | 0.03 | |
| R2 | Monetization | 0.00 | |
| R3 | Social risk | 0.00 | |
The game contains mature themes, including ritual murders, which contribute to a higher violence and fear/horror content risk. While it avoids manipulative compulsion-loop mechanics and monetization pressures, the dark subject matter may not be suitable for all players.
Content (not in risk score)
| R4.1 | Violence Level | 1.00 | |
| R4.2 | Sexual Content | 0.00 | |
| R4.3 | Language | 0.33 | |
| R4.4 | Substance References | 0.00 | |
| R4.5 | Fear / Horror | 0.67 | |
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.