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Ys IX: Monstrum Nox

Review · Action · PlayStation 4 · Nintendo Switch · PC

Ys IX: Monstrum Nox

Reviewed: 01 May 2026

PlayStation 4 · Nintendo Switch · PC

Engine Software · 2021

Ludograph rating

A

Recommended

70 /100

Automated review

Ys IX: Monstrum Nox is an action RPG that builds strategic thinking and problem solving, suitable for teens comfortable with fantasy violence and mild suggestive themes.

06010030Benefit →Low risk →B 56 · R 7
The Ludograph reading, plotted from the published benefit and risk sub-scores.

Growth (BDS)

56

Risk (RIS)

7

Daily limit

120min

Age guidance

13+

Developmental benefits

B1Cognitive
0.66
B2Social-emotional
0.47
B3Motor
0.45

Ys IX: Monstrum Nox offers a rich narrative and engaging action RPG combat that encourages strategic thinking, problem-solving, and critical thinking. Players will develop memory and attention skills as they navigate the intricate world and story. The game also provides opportunities for emotional engagement through its characters and themes.

Design risks

R1Compulsion-loop pressure
0.13
R2Monetization
0.00
R3Social risk
0.06

While Ys IX has minimal monetization risks, it does contain fantasy violence and some suggestive themes, consistent with its T for Teen rating. The narrative's mild anti-authoritarian themes could be discussed with younger players.

Content (not in risk score)

R4.1Violence Level
0.67
R4.2Sexual Content
0.33
R4.3Language
0.33
R4.4Substance References
0.00
R4.5Fear / 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.

Avg playtime~7 hReviewedMay 2026Report a data error →How scores are calculated →

Parents ask…

Is Ys IX: Monstrum Nox safe for kids?

Ludograph gives Ys IX: Monstrum Nox a rating of 70/100, recommended for ages 13 and up. It scores well on developmental benefits with manageable risks.

What age is Ys IX: Monstrum Nox appropriate for?

Ludograph's rubric recommends a minimum age of 13+ for Ys IX: Monstrum Nox, based on benefits, risks, and content review.

How long should kids play Ys IX: Monstrum Nox?

Our session recommendation for Ys IX: Monstrum Nox 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 Ys IX: Monstrum Nox?

While Ys IX has minimal monetization risks, it does contain fantasy violence and some suggestive themes, consistent with its T for Teen rating. The narrative's mild anti-authoritarian themes could be discussed with younger players.