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htoL#NiQ: The Firefly Diary

Review · Action · iOS · PC

htoL#NiQ: The Firefly Diary

Reviewed: 17 May 2026

iOS · PC

Nippon Ichi Software · 2016

Ludograph rating

C

Mixed

52 /100

Automated review
06010030Benefit →Low risk →B 35 · R 0
The Ludograph reading, plotted from the published benefit and risk sub-scores.

Growth (BDS)

35

Risk (RIS)

0

Daily limit

120min

Age guidance

15+

Developmental benefits

B1Cognitive
0.48
B2Social-emotional
0.07
B3Motor
0.45

htoL#NiQ: The Firefly Diary offers a strong cognitive challenge through its puzzle-solving and strategic elements. Players must carefully consider their actions and the environment to guide Mion safely. The game encourages critical thinking as players learn from mistakes and adapt their approaches to overcome obstacles.

Design risks

R1Compulsion-loop pressure
0.00
R2Monetization
0.00
R3Social risk
0.00

The game contains moderate levels of violence and fear/horror themes, as Mion frequently encounters dangerous creatures and environments. The 'defencelessTarget' modifier is applied due to Mion being a vulnerable child protagonist in a perilous setting.

Content (not in risk score)

R4.1Violence Level
0.67
R4.2Sexual Content
0.00
R4.3Language
0.00
R4.4Substance References
0.00
R4.5Fear / 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.

Avg playtime~4 hReviewedMay 2026Report a data error →How scores are calculated →

Parents ask…

Is htoL#NiQ: The Firefly Diary safe for kids?

Ludograph gives htoL#NiQ: The Firefly Diary a rating of 52/100, recommended for ages 15 and up. It delivers genuine benefits but carries design risks that deserve a close look.

What age is htoL#NiQ: The Firefly Diary appropriate for?

Ludograph's rubric recommends a minimum age of 15+ for htoL#NiQ: The Firefly Diary, based on benefits, risks, and content review. That is more lenient than ESRB M: industry ratings reflect content intensity, while ours also weighs how the game is designed to be played.

How long should kids play htoL#NiQ: The Firefly Diary?

Our session recommendation for htoL#NiQ: The Firefly Diary is up to 120 minutes per day. It is derived from the game's own structure (natural stopping points, compulsion-loop design, monetization pressure, and social dynamics), not from a universal screen-time dose.

Session recommendations are design-based heuristics. Evidence linking specific daily durations to child outcomes is limited, and context matters as much as time; treat this as a starting point for household rules, not a clinical threshold.

What are the main risks of htoL#NiQ: The Firefly Diary?

The game contains moderate levels of violence and fear/horror themes, as Mion frequently encounters dangerous creatures and environments. The 'defencelessTarget' modifier is applied due to Mion being a vulnerable child protagonist in a perilous setting.