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RiichiCity - ACG mahjong games

Review · Board Games · iOS · Android · PC

RiichiCity - ACG mahjong games

Reviewed: 05 Jun 2026

iOS · Android · PC

Lancelot Tech · 2022

Ludograph rating

B

Good

66 /100

Automated review
06010030Benefit →Low risk →B 54 · R 16
The Ludograph reading, plotted from the published benefit and risk sub-scores.

Growth (BDS)

54

Risk (RIS)

16

Daily limit

90min

Age guidance

9+

Developmental benefits

B1Cognitive
0.84
B2Social-emotional
0.30
B3Motor
0.15

RiichiCity offers significant cognitive benefits through strategic and critical thinking, problem-solving, and memory development inherent in mahjong gameplay. It also fosters positive social interaction within its global community and events, allowing players to connect and learn together.

Design risks

R1Compulsion-loop pressure
0.17
R2Monetization
0.04
R3Social risk
0.28

While largely free from aggressive monetization, RiichiCity presents some risks related to competitive social dynamics and potential for mild compulsion-loop design through events and rewards. The ACG character design may also contain mild suggestive themes.

Content (not in risk score)

R4.1Violence Level
0.00
R4.2Sexual Content
0.33
R4.3Language
0.33
R4.4Substance References
0.00
R4.5Fear / Horror
0.00

Content risk is displayed separately and does not affect the time recommendation.

Regulatory design checks · DSA — Not yet assessed·GDPR-K — Not yet assessed·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.
  • GDPR-K:What Ludograph checks: whether age assurance and consent flows are designed for under-16s, in the spirit of GDPR Article 8.
  • 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.

ReviewedJun 2026Report a data error →How scores are calculated →

Parents ask…

Is RiichiCity - ACG mahjong games safe for kids?

Ludograph gives RiichiCity - ACG mahjong games a rating of 66/100, recommended for ages 9 and up. It offers solid benefits but needs parental guidance on the risks.

What age is RiichiCity - ACG mahjong games appropriate for?

Ludograph's rubric recommends a minimum age of 9+ for RiichiCity - ACG mahjong games, based on benefits, risks, and content review. That is more lenient than ESRB T: industry ratings reflect content intensity, while ours also weighs how the game is designed to be played.

How long should kids play RiichiCity - ACG mahjong games?

Our session recommendation for RiichiCity - ACG mahjong games is up to 90 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 RiichiCity - ACG mahjong games?

While largely free from aggressive monetization, RiichiCity presents some risks related to competitive social dynamics and potential for mild compulsion-loop design through events and rewards. The ACG character design may also contain mild suggestive themes.