LumiKin
Ys IX: Monstrum Nox

Review · Action · PlayStation 4 · Nintendo Switch · PC

Ys IX: Monstrum Nox

By the LumiKin editors

Reviewed: 01 May 2026

PlayStation 4 · Nintendo Switch · PC

Engine Software · 2021

LumiScore

70/100

Recommended

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.

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

R1Dopamine 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.

Heads up

  • Monthly spendTypical real-money spend by engaged players: $0–0/mo.
Avg playtime~7 hReviewedMay 2026How scores are calculated →

Parents ask…

Is Ys IX: Monstrum Nox safe for kids?

LumiKin gives Ys IX: Monstrum Nox a LumiScore 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?

LumiKin's rubric recommends a minimum age of 13+ for Ys IX: Monstrum Nox (T), based on benefits, risks, and content review.

How long should kids play Ys IX: Monstrum Nox?

LumiKin's recommended play time for Ys IX: Monstrum Nox is Up to 120 min/day, calibrated to the game's dopamine, monetization, and social-pressure profile.

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.