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Ys IX: Monstrum Nox

Also known as Ys IX: Monstrum Nox, steam:1351630, y9mn

While imprisoned in Balduq, Adol is cursed and becomes a Monstrum. With his newfound powers, he must stop the Grimwald Nox from consuming the city.

Last update
17 May 2026
Players now
34

Latest update

Announcement

v1.1.4Version 1.1.4 Release Notes

Hi everyone, today we are releasing a patch for Ys IX which improves how the game interacts with platform achievement APIs. This should prevent performance issues in some circumstances, specifically when a large number…

1 changePerformanceRead announcement

Update history

Browse past updates and patch notes for this game.

8 updates

Gallery

In-game media

Achievements

Community progression

Top picks from 54 Steam achievements, sorted by player unlock rates.

  • To FreedomHidden92.1%
  • Adol, the FugitiveHidden87.9%
  • Zenith of the GrimwaldAchieve an S in a Grimwald Nox.83.8%
  • Monstrum NoxHidden83.1%
  • The White Cat's MelancholyHidden71.7%
  • The Feral Hawk's FuryHidden65.2%