The Game Census
UNDER NIGHT IN-BIRTH II Sys:Celes cover art

UNDER NIGHT IN-BIRTH II Sys:Celes

FRENCH-BREAD · Arc System Works · 2024-01-24

SteamPlayStation StoreAmazon

Action

Modes: Single player, Multiplayer, Split screen

Releases: Jan 25, 2024 (Nintendo Switch), Jan 25, 2024 (PC (Microsoft Windows)), Jan 25, 2024 (PlayStation 4), Jan 25, 2024 (PlayStation 5)

The newest riveting installment in the epic Under Night In-Birth saga rises from the Abyss! Improved visuals and battle system! Witness the curtain fall on the tale of the Hollow Night. Vie for supremacy through exhilarating combat and a deep, robust battle system!

122
playing now
87%
positive of 2.6k reviews
Very Positive
steam rating
100,000–200,000
owners (SteamSpy est.)
80/100
critic score (1 outlets, IGDB)
73/100
IGDB user rating (6 ratings)
gold
deck/linux tier (ProtonDB)
$49.99
steam price (US)

122 players in-game as of 2026-08-30 05:00 UTC (census sample)

Under Night In-Birth II [Sys:Celes] is a 2024 fighting game developed by French-Bread and published by Arc System Works. It is a sequel to Under Night In-Birth. It was released for PlayStation 4, PlayStation 5, Microsoft Windows, and Nintendo Switch on 21 January 2024. The arcade version was released for the Sega ALLS arcade board in 2025.

Health check

Healthy
  • · 122 players in-game at the last census sample.
  • · 203 reviews in the last 8 weeks (~25/week).
  • · Review velocity down 19% vs the prior 8 weeks.
  • · Current weekly pace is under 5% of the all-time peak week (659 reviews).
  • · Top 23% of 10,791 Action games in the census by review count.

Health tier since 2026-08-30

Estimated sales: 53k–119k copies

Review-multiple estimate from 2,636 total reviews — how this is computed.

Current store prices

lowest across shops (ITAD)$37.44-25%

Deal snapshots via CheapShark, refreshed daily.

All-time low: $19.49 at WinGameStore (2026-07-01) · bundled 1×via IsThereAnyDeal

12-month high $49.99 · on sale 38 of 50 observed days (census price snapshots)

Review momentum

PositiveNegative
35435420242026Week of 2024-01-01: 354 positiveWeek of 2024-01-01: 305 negativeWeek of 2024-02-01: 298 positiveWeek of 2024-02-01: 78 negativeWeek of 2024-03-01: 59 positiveWeek of 2024-03-01: 8 negativeWeek of 2024-04-01: 40 positiveWeek of 2024-04-01: 8 negativeWeek of 2024-05-01: 26 positiveWeek of 2024-05-01: 3 negativeWeek of 2024-06-01: 18 positiveWeek of 2024-06-01: 3 negativeWeek of 2024-07-01: 99 positiveWeek of 2024-07-01: 17 negativeWeek of 2024-08-01: 45 positiveWeek of 2024-08-01: 3 negativeWeek of 2024-09-01: 29 positiveWeek of 2024-09-01: 2 negativeWeek of 2024-10-01: 22 positiveWeek of 2024-10-01: 2 negativeWeek of 2024-11-01: 61 positiveWeek of 2024-11-01: 4 negativeWeek of 2024-12-01: 48 positiveWeek of 2024-12-01: 4 negativeWeek of 2025-01-01: 21 positiveWeek of 2025-01-01: 4 negativeWeek of 2025-02-01: 36 positiveWeek of 2025-02-01: 4 negativeWeek of 2025-03-01: 41 positiveWeek of 2025-03-01: 7 negativeWeek of 2025-04-01: 33 positiveWeek of 2025-04-01: 3 negativeWeek of 2025-05-01: 25 positiveWeek of 2025-05-01: 6 negativeWeek of 2025-06-01: 25 positiveWeek of 2025-06-01: 7 negativeWeek of 2025-07-01: 17 positiveWeek of 2025-07-01: 4 negativeWeek of 2025-08-01: 52 positiveWeek of 2025-08-01: 8 negativeWeek of 2025-09-01: 13 positiveWeek of 2025-09-01: 3 negativeWeek of 2025-10-01: 21 positiveWeek of 2025-10-01: 3 negativeWeek of 2025-11-01: 29 positiveWeek of 2025-11-01: 3 negativeWeek of 2025-12-01: 20 positiveWeek of 2025-12-01: 2 negativeWeek of 2026-01-01: 28 positiveWeek of 2026-01-01: 3 negativeWeek of 2026-02-01: 25 positiveWeek of 2026-02-01: 1 negativeWeek of 2026-03-01: 24 positiveWeek of 2026-03-01: 2 negativeWeek of 2026-04-01: 18 positiveWeek of 2026-04-01: 1 negativeWeek of 2026-05-01: 17 positiveWeek of 2026-05-01: 4 negativeWeek of 2026-06-01: 22 positiveWeek of 2026-06-01: 1 negativeWeek of 2026-07-01: 32 positiveWeek of 2026-07-01: 3 negativeWeek of 2026-08-01: 11 positive
Weekly review counts (Steam review histogram). Positive above the line, negative below.

Players online

163342026-08-11 19:00 — 96 players2026-08-12 11:00 — 59 players2026-08-13 03:00 — 130 players2026-08-13 19:00 — 65 players2026-08-14 10:00 — 53 players2026-08-15 02:00 — 100 players2026-08-15 18:00 — 117 players2026-08-16 10:00 — 66 players2026-08-17 02:00 — 126 players2026-08-17 18:00 — 111 players2026-08-18 10:00 — 34 players2026-08-19 01:00 — 150 players2026-08-19 17:00 — 90 players2026-08-20 09:00 — 41 players2026-08-21 01:00 — 143 players2026-08-21 16:00 — 101 players2026-08-22 08:00 — 82 players2026-08-23 00:00 — 163 players2026-08-23 16:00 — 99 players2026-08-24 07:00 — 48 players2026-08-24 23:00 — 137 players2026-08-25 15:00 — 90 players2026-08-26 07:00 — 65 players2026-08-27 00:00 — 156 players2026-08-27 13:00 — 86 players2026-08-28 05:00 — 91 players2026-08-28 21:00 — 144 players2026-08-29 13:00 — 79 players2026-08-30 05:00 — 122 players
Concurrent players, hourly average, last 30 days (census samples).

Price history

$49.99$19.492023-11-162026-08-172023-11-16 — best price $49.992024-01-24 — best price $49.992024-03-08 — best price $39.992024-07-29 — best price $49.992024-09-13 — best price $20.692024-09-26 — best price $24.992024-10-08 — best price $49.992024-10-24 — best price $21.152024-11-05 — best price $49.992024-11-27 — best price $24.992024-12-19 — best price $24.992025-01-03 — best price $49.992025-02-12 — best price $40.492025-03-21 — best price $24.992025-04-05 — best price $49.992025-04-26 — best price $21.352025-05-20 — best price $40.492025-06-08 — best price $40.492025-07-12 — best price $36.742025-08-13 — best price $49.992025-10-01 — best price $24.982025-10-20 — best price $24.992025-11-24 — best price $23.992025-12-19 — best price $21.002026-01-13 — best price $39.892026-02-13 — best price $39.892026-03-04 — best price $39.872026-03-27 — best price $49.992026-04-03 — best price $40.492026-04-26 — best price $39.892026-07-02 — best price $23.992026-07-11 — best price $39.892026-08-17 — best price $37.44
Lowest recorded price across tracked stores, per day (census snapshots).

Attention

293282026-05-29 — 47 pageviews2026-06-01 — 73 pageviews2026-06-04 — 46 pageviews2026-06-07 — 58 pageviews2026-06-10 — 43 pageviews2026-06-13 — 53 pageviews2026-06-16 — 39 pageviews2026-06-19 — 39 pageviews2026-06-22 — 60 pageviews2026-06-25 — 93 pageviews2026-06-28 — 293 pageviews2026-07-01 — 94 pageviews2026-07-04 — 92 pageviews2026-07-07 — 76 pageviews2026-07-10 — 76 pageviews2026-07-13 — 70 pageviews2026-07-16 — 55 pageviews2026-07-19 — 64 pageviews2026-07-22 — 59 pageviews2026-07-25 — 68 pageviews2026-07-28 — 54 pageviews2026-07-31 — 48 pageviews2026-08-03 — 65 pageviews2026-08-06 — 72 pageviews2026-08-09 — 69 pageviews2026-08-12 — 44 pageviews2026-08-15 — 50 pageviews2026-08-18 — 54 pageviews2026-08-21 — 108 pageviews2026-08-24 — 88 pageviews2026-08-25 — 71 pageviews
Daily Wikipedia pageviews (attention proxy, census-recorded).

Twitch viewers

10302026-08-27 01:34 — 78 viewers2026-08-27 02:34 — 103 viewers2026-08-27 03:34 — 21 viewers2026-08-27 04:34 — 11 viewers2026-08-27 05:34 — 10 viewers2026-08-27 06:34 — 7 viewers2026-08-27 07:33 — 10 viewers2026-08-27 08:34 — 4 viewers2026-08-27 09:33 — 5 viewers2026-08-27 10:34 — 6 viewers2026-08-27 11:34 — 0 viewers2026-08-27 12:34 — 0 viewers2026-08-27 13:34 — 0 viewers
Hourly Twitch viewers (census snapshots).

Completion

27
achievements tracked
56%
earned "Seems I've Grown!"
15.3%
median achievement earned by

Global achievement rates from Steam.

Details

WindowsFull controller supportSingle-playerMulti-playerPvPOnline PvPShared/Split Screen PvPShared/Split ScreenSteam AchievementsFull controller supportGamepad RecommendedDualShock Controller Support5 DLC

8 supported languages: English, French, Italian, German, Spanish - Spain, Japanese, Korean, Simplified Chinese

Player tags

2DPvPAnimeDramaActionArcadeFighting2D FighterComic BookMultiplayer

Census log

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

Recent updates

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Similarity via IGDB.

Official site ↗