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 · Perspectives: Side view

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!

UNDER NIGHT IN-BIRTH II Sys:Celes is an Action game released in 2024, priced at $49.99, with an estimated 100,000 .. 200,000 owners and a Very Positive review sentiment (87% of 2655 reviews).

96
playing now
87%
positive of 2.7k reviews
Very Positive
steam's rating (official)
100,000–200,000
owners (SteamSpy est.)
80/100
critic score (1 outlets, IGDB)
73/100
IGDB user rating (6 ratings)
4.81★
PlayStation Store rating (700 ratings)
gold
deck/linux tier (ProtonDB)
Unsupported
Steam Deck (Valve)
SteamOS: Unsupported
$49.99
steam price (US)

96 players in-game as of 2026-10-14 14:00 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
  • · 96 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 9% of 27,649 Action games in the census by review count.

Health tier since 2026-08-30

Estimated sales: 54k–122k copies

Review-multiple estimate from 2,708 total reviews — how this is computed.

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

12-month high $49.99 · on sale 34 of 45 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

691572026-09-15 00:00 — 156 players2026-09-16 08:00 — 366 players2026-09-17 15:00 — 347 players2026-09-18 23:00 — 429 players2026-09-20 06:00 — 237 players2026-09-21 14:00 — 242 players2026-09-22 22:00 — 265 players2026-09-24 05:00 — 164 players2026-09-25 13:00 — 132 players2026-09-26 20:00 — 250 players2026-09-28 04:00 — 174 players2026-09-29 11:00 — 84 players2026-09-30 19:00 — 134 players2026-10-02 02:00 — 183 players2026-10-03 10:00 — 100 players2026-10-04 18:00 — 177 players2026-10-06 01:00 — 201 players2026-10-07 09:00 — 74 players2026-10-08 16:00 — 130 players2026-10-10 00:00 — 182 players2026-10-11 07:00 — 95 players2026-10-12 15:00 — 100 players2026-10-13 23:00 — 126 players2026-10-14 14:00 — 96 players
Concurrent players, hourly average, last 30 days (census samples).
1.2k98Jan 2024Aug 2026Jan 2024 — avg 1,183 · peak 2,165Feb 2024 — avg 456 · peak 1,183Mar 2024 — avg 234 · peak 446Apr 2024 — avg 178 · peak 314May 2024 — avg 132 · peak 279Jun 2024 — avg 116 · peak 264Jul 2024 — avg 307 · peak 2,044Aug 2024 — avg 198 · peak 543Sep 2024 — avg 138 · peak 268Oct 2024 — avg 126 · peak 249Nov 2024 — avg 118 · peak 226Dec 2024 — avg 98 · peak 199Jan 2025 — avg 103 · peak 200Feb 2025 — avg 211 · peak 1,655Mar 2025 — avg 175 · peak 340Apr 2025 — avg 150 · peak 330May 2025 — avg 126 · peak 266Jun 2025 — avg 122 · peak 233Jul 2025 — avg 115 · peak 251Aug 2025 — avg 234 · peak 1,766Sep 2025 — avg 110 · peak 266Oct 2025 — avg 108 · peak 248Nov 2025 — avg 111 · peak 216Dec 2025 — avg 120 · peak 223Jan 2026 — avg 128 · peak 287Feb 2026 — avg 113 · peak 210Mar 2026 — avg 128 · peak 319Apr 2026 — avg 119 · peak 269May 2026 — avg 116 · peak 236Jun 2026 — avg 110 · peak 371Jul 2026 — avg 170 · peak 378Aug 2026 — avg 102 · peak 187
Monthly average players (source: steamcharts.com) — history via steamcharts.com; live census sampling since Aug 2026.

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 pageviews2026-06-02 — 60 pageviews2026-06-06 — 48 pageviews2026-06-10 — 43 pageviews2026-06-14 — 45 pageviews2026-06-18 — 42 pageviews2026-06-22 — 60 pageviews2026-06-26 — 137 pageviews2026-06-30 — 111 pageviews2026-07-04 — 92 pageviews2026-07-08 — 84 pageviews2026-07-12 — 51 pageviews2026-07-16 — 55 pageviews2026-07-20 — 72 pageviews2026-07-24 — 101 pageviews2026-07-28 — 54 pageviews2026-08-01 — 59 pageviews2026-08-05 — 49 pageviews2026-08-09 — 69 pageviews2026-08-13 — 28 pageviews2026-08-17 — 55 pageviews2026-08-21 — 108 pageviews2026-08-25 — 71 pageviews2026-08-29 — 48 pageviews2026-09-02 — 40 pageviews2026-09-06 — 46 pageviews2026-09-10 — 36 pageviews2026-09-14 — 38 pageviews2026-09-18 — 54 pageviews2026-09-22 — 60 pageviews2026-09-26 — 48 pageviews2026-09-30 — 56 pageviews2026-10-04 — 61 pageviews2026-10-07 — 44 pageviews
Daily Wikipedia pageviews (attention proxy, census-recorded).

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

Post-launch support: 5 DLC released, first 2024-01-24, latest 2025-08-19 (Steam store data)

Where its players are

Share of Steam reviews by language (top languages measured) — a proxy for where the player base lives.

Player tags

2DPvPAnimeDramaActionArcadeFighting2D FighterComic BookMultiplayer

Census log

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

Recent updates

Players also track

GAROU: MARK OF THE WOLVESRICOKILL la KILL -IF

Similarity via IGDB.

Official site ↗