The Game Census
Ys IX: Monstrum Nox cover art

Ys IX: Monstrum Nox

Nihon Falcom · NIS America, Inc. · 2021-07-06

SteamGOGPlayStation StoreEpic Games StoreAmazon

ActionRPG

Franchise: Ys · Modes: Single player, Multiplayer, Co-operative

Releases: Jul 06, 2021 (Google Stadia), Sep 09, 2021 (Nintendo Switch), Sep 26, 2019 (PlayStation 4), May 12, 2023 (PlayStation 5), Jul 06, 2021 (PC (Microsoft Windows))

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.

23
playing now
94%
positive of 1.9k reviews
Very Positive
steam rating
50,000–100,000
owners (SteamSpy est.)
84/100
critic score (6 outlets, IGDB)
83/100
IGDB user rating (34 ratings)
53h
to beat · rushed 30h · completionist 50h
platinum
deck/linux tier (ProtonDB)
$59.99
steam price (US)

23 players in-game as of 2026-08-30 07:00 UTC (census sample)

Ys IX: Monstrum Nox is a 2019 action role-playing game developed by Nihon Falcom. The ninth numbered installment in the Ys series, it was first released for the PlayStation 4 in Japan in September 2019. NIS America released the game internationally in February 2021, followed by versions for Windows, Nintendo Switch, Google Stadia, and PlayStation 5.

Health check

Insufficient data
  • · Not enough review history collected yet to judge health.
  • · Top 26% of 10,935 Action games in the census by review count.
Estimated sales: 39k–87k copies

Review-multiple estimate from 1,928 total reviews — how this is computed.

All-time low: $23.99 at Steam (2025-10-31)via IsThereAnyDeal

12-month high $59.99 · on sale 15 of 33 observed days (census price snapshots)

Players online

33102026-08-11 22:00 — 17 players2026-08-12 14:00 — 23 players2026-08-13 06:00 — 18 players2026-08-13 21:00 — 10 players2026-08-14 13:00 — 19 players2026-08-15 05:00 — 16 players2026-08-15 21:00 — 25 players2026-08-16 13:00 — 33 players2026-08-17 05:00 — 12 players2026-08-17 21:00 — 18 players2026-08-18 12:00 — 24 players2026-08-19 04:00 — 12 players2026-08-19 20:00 — 19 players2026-08-20 12:00 — 20 players2026-08-21 03:00 — 16 players2026-08-21 19:00 — 14 players2026-08-22 11:00 — 26 players2026-08-23 03:00 — 21 players2026-08-23 18:00 — 22 players2026-08-24 10:00 — 16 players2026-08-25 02:00 — 23 players2026-08-25 18:00 — 15 players2026-08-26 10:00 — 16 players2026-08-27 03:00 — 23 players2026-08-27 19:00 — 20 players2026-08-28 08:00 — 13 players2026-08-28 23:00 — 22 players2026-08-29 15:00 — 30 players2026-08-30 07:00 — 23 players
Concurrent players, hourly average, last 30 days (census samples).

Price history

$94.27$23.992021-07-062026-07-092021-07-06 — best price $59.992021-11-19 — best price $47.992021-12-01 — best price $59.992022-01-06 — best price $59.992022-02-03 — best price $59.992022-03-21 — best price $59.992022-05-07 — best price $59.992022-06-24 — best price $47.992022-07-25 — best price $59.992022-09-12 — best price $59.992022-11-01 — best price $41.992022-12-02 — best price $59.992023-01-06 — best price $59.992023-03-23 — best price $41.992023-05-12 — best price $59.992023-07-18 — best price $59.992023-08-25 — best price $59.992023-11-01 — best price $35.992023-12-11 — best price $35.992024-01-10 — best price $94.272024-03-20 — best price $35.992024-05-01 — best price $35.992024-06-27 — best price $35.992024-08-05 — best price $35.992024-10-25 — best price $29.992024-12-03 — best price $59.992025-01-05 — best price $59.992025-02-17 — best price $59.992025-03-31 — best price $59.992025-05-19 — best price $29.992025-07-25 — best price $30.002025-09-04 — best price $59.992025-11-05 — best price $29.992025-12-03 — best price $59.992025-12-22 — best price $23.992026-07-09 — best price $59.99
Lowest recorded price across tracked stores, per day (census snapshots).

Attention

126562026-05-30 — 73 pageviews2026-06-02 — 56 pageviews2026-06-05 — 61 pageviews2026-06-08 — 71 pageviews2026-06-11 — 72 pageviews2026-06-14 — 88 pageviews2026-06-17 — 88 pageviews2026-06-20 — 71 pageviews2026-06-23 — 59 pageviews2026-06-26 — 100 pageviews2026-06-29 — 67 pageviews2026-07-02 — 93 pageviews2026-07-05 — 110 pageviews2026-07-08 — 82 pageviews2026-07-11 — 86 pageviews2026-07-14 — 66 pageviews2026-07-17 — 111 pageviews2026-07-20 — 67 pageviews2026-07-23 — 81 pageviews2026-07-26 — 78 pageviews2026-07-29 — 65 pageviews2026-08-01 — 60 pageviews2026-08-04 — 70 pageviews2026-08-07 — 82 pageviews2026-08-10 — 69 pageviews2026-08-13 — 86 pageviews2026-08-16 — 73 pageviews2026-08-19 — 74 pageviews2026-08-22 — 61 pageviews2026-08-25 — 68 pageviews2026-08-27 — 60 pageviews
Daily Wikipedia pageviews (attention proxy, census-recorded).

Completion

54
achievements tracked
92.1%
earned "To Freedom"
34%
median achievement earned by

Global achievement rates from Steam.

Details

WindowsFull controller supportSingle-playerMulti-playerCo-opShared/Split Screen Co-opShared/Split ScreenSteam AchievementsFull controller supportSteam Trading CardsColor AlternativesCustom Volume Controls4 DLC

2 supported languages: English, French

Console footprint

PlatformPlayers trackedCompletionTrophies/achievements
PS4 (PlayStation)7,86720%54
Steam (Steam)1,93614%54
PS5 (PlayStation)49328%54
Steam (Steam)23617%54
Switch (Nintendo)1330%0

Players tracked by Exophase (achievement/trophy trackers) — a sample of the player base, not total sales.

Player tags

3DRPGDarkJRPGAnimeDramaActionFantasyColorfulAdventure

Census log

Computed from census-recorded observations only — dates are observation dates.

Players also track

Immortal: UnchainedLEGRAND LEGACY: Tale of the FateboundsGreedFallEternity: The Last UnicornWarhammer: ChaosbaneONINAKITorchlight IIIDragon Marked For Death

Similarity via IGDB.

Official site ↗Wikipedia ↗