The Game Census
Sudoku Universe / 数独宇宙 cover art

Sudoku Universe / 数独宇宙

Konstructors · Hook Games · 2017-12-18

Steam

CasualIndieStrategy

Modes: Single player

Releases: Dec 18, 2017 (PC (Microsoft Windows))

Making the best Sudoku game on Steam.

32
playing now
95%
positive of 3.2k reviews
Very Positive
steam rating
100,000–200,000
owners (SteamSpy est.)
70/100
IGDB user rating (1 ratings)
silver
deck/linux tier (ProtonDB)
$2.99
steam price (US)

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

Health check

Quietly active
  • · 32 players in-game at the last census sample.
  • · 147 reviews in the last 8 weeks (~18/week).
  • · Review velocity down 28% vs the prior 8 weeks.
  • · Top 9% of 9,649 Casual games in the census by review count.
Estimated sales: 80k–192k copies

Review-multiple estimate from 3,207 total reviews — how this is computed.

All-time low: $0.49 at Steam (2018-06-21)via IsThereAnyDeal

Review momentum

PositiveNegative
797920182026Week of 2018-01-01: 19 positiveWeek of 2018-02-01: 14 positiveWeek of 2018-02-01: 1 negativeWeek of 2018-03-01: 15 positiveWeek of 2018-03-01: 2 negativeWeek of 2018-04-01: 11 positiveWeek of 2018-04-01: 2 negativeWeek of 2018-05-01: 6 positiveWeek of 2018-05-01: 2 negativeWeek of 2018-06-01: 14 positiveWeek of 2018-06-01: 1 negativeWeek of 2018-07-01: 21 positiveWeek of 2018-07-01: 3 negativeWeek of 2018-08-01: 12 positiveWeek of 2018-08-01: 1 negativeWeek of 2018-09-01: 15 positiveWeek of 2018-09-01: 5 negativeWeek of 2018-10-01: 15 positiveWeek of 2018-10-01: 3 negativeWeek of 2018-11-01: 30 positiveWeek of 2018-12-01: 14 positiveWeek of 2018-12-01: 1 negativeWeek of 2019-01-01: 11 positiveWeek of 2019-01-01: 1 negativeWeek of 2019-02-01: 12 positiveWeek of 2019-02-01: 1 negativeWeek of 2019-03-01: 13 positiveWeek of 2019-04-01: 7 positiveWeek of 2019-05-01: 10 positiveWeek of 2019-06-01: 47 positiveWeek of 2019-07-01: 39 positiveWeek of 2019-07-01: 3 negativeWeek of 2019-08-01: 9 positiveWeek of 2019-09-01: 4 positiveWeek of 2019-10-01: 9 positiveWeek of 2019-11-01: 34 positiveWeek of 2019-11-01: 3 negativeWeek of 2019-12-01: 33 positiveWeek of 2020-01-01: 29 positiveWeek of 2020-01-01: 3 negativeWeek of 2020-02-01: 19 positiveWeek of 2020-03-01: 58 positiveWeek of 2020-03-01: 2 negativeWeek of 2020-04-01: 34 positiveWeek of 2020-04-01: 1 negativeWeek of 2020-05-01: 27 positiveWeek of 2020-05-01: 1 negativeWeek of 2020-06-01: 35 positiveWeek of 2020-06-01: 3 negativeWeek of 2020-07-01: 79 positiveWeek of 2020-07-01: 5 negativeWeek of 2020-08-01: 32 positiveWeek of 2020-08-01: 1 negativeWeek of 2020-09-01: 33 positiveWeek of 2020-10-01: 27 positiveWeek of 2020-11-01: 24 positiveWeek of 2020-11-01: 1 negativeWeek of 2020-12-01: 30 positiveWeek of 2020-12-01: 2 negativeWeek of 2021-01-01: 62 positiveWeek of 2021-01-01: 1 negativeWeek of 2021-02-01: 39 positiveWeek of 2021-02-01: 3 negativeWeek of 2021-03-01: 70 positiveWeek of 2021-03-01: 3 negativeWeek of 2021-04-01: 43 positiveWeek of 2021-05-01: 35 positiveWeek of 2021-05-01: 2 negativeWeek of 2021-06-01: 34 positiveWeek of 2021-06-01: 1 negativeWeek of 2021-07-01: 54 positiveWeek of 2021-07-01: 3 negativeWeek of 2021-08-01: 37 positiveWeek of 2021-08-01: 1 negativeWeek of 2021-09-01: 51 positiveWeek of 2021-09-01: 3 negativeWeek of 2021-10-01: 22 positiveWeek of 2021-10-01: 3 negativeWeek of 2021-11-01: 59 positiveWeek of 2021-11-01: 2 negativeWeek of 2021-12-01: 75 positiveWeek of 2021-12-01: 1 negativeWeek of 2022-01-01: 48 positiveWeek of 2022-01-01: 6 negativeWeek of 2022-02-01: 35 positiveWeek of 2022-02-01: 1 negativeWeek of 2022-03-01: 23 positiveWeek of 2022-04-01: 37 positiveWeek of 2022-04-01: 2 negativeWeek of 2022-05-01: 40 positiveWeek of 2022-05-01: 2 negativeWeek of 2022-06-01: 39 positiveWeek of 2022-06-01: 1 negativeWeek of 2022-07-01: 76 positiveWeek of 2022-07-01: 4 negativeWeek of 2022-08-01: 44 positiveWeek of 2022-08-01: 1 negativeWeek of 2022-09-01: 24 positiveWeek of 2022-09-01: 1 negativeWeek of 2022-10-01: 32 positiveWeek of 2022-10-01: 1 negativeWeek of 2022-11-01: 43 positiveWeek of 2022-12-01: 37 positiveWeek of 2022-12-01: 2 negativeWeek of 2023-01-01: 48 positiveWeek of 2023-01-01: 2 negativeWeek of 2023-02-01: 38 positiveWeek of 2023-03-01: 39 positiveWeek of 2023-03-01: 1 negativeWeek of 2023-04-01: 25 positiveWeek of 2023-04-01: 3 negativeWeek of 2023-05-01: 21 positiveWeek of 2023-05-01: 5 negativeWeek of 2023-06-01: 22 positiveWeek of 2023-06-01: 3 negativeWeek of 2023-07-01: 33 positiveWeek of 2023-07-01: 3 negativeWeek of 2023-08-01: 22 positiveWeek of 2023-08-01: 1 negativeWeek of 2023-09-01: 17 positiveWeek of 2023-10-01: 14 positiveWeek of 2023-10-01: 1 negativeWeek of 2023-11-01: 31 positiveWeek of 2023-11-01: 2 negativeWeek of 2023-12-01: 38 positiveWeek of 2023-12-01: 1 negativeWeek of 2024-01-01: 28 positiveWeek of 2024-01-01: 4 negativeWeek of 2024-02-01: 14 positiveWeek of 2024-02-01: 1 negativeWeek of 2024-03-01: 32 positiveWeek of 2024-03-01: 2 negativeWeek of 2024-04-01: 25 positiveWeek of 2024-04-01: 3 negativeWeek of 2024-05-01: 13 positiveWeek of 2024-05-01: 2 negativeWeek of 2024-06-01: 30 positiveWeek of 2024-06-01: 4 negativeWeek of 2024-07-01: 47 positiveWeek of 2024-07-01: 1 negativeWeek of 2024-08-01: 29 positiveWeek of 2024-08-01: 3 negativeWeek of 2024-09-01: 27 positiveWeek of 2024-09-01: 2 negativeWeek of 2024-10-01: 22 positiveWeek of 2024-11-01: 26 positiveWeek of 2024-11-01: 1 negativeWeek of 2024-12-01: 41 positiveWeek of 2024-12-01: 2 negativeWeek of 2025-01-01: 31 positiveWeek of 2025-01-01: 1 negativeWeek of 2025-02-01: 15 positiveWeek of 2025-02-01: 2 negativeWeek of 2025-03-01: 34 positiveWeek of 2025-03-01: 6 negativeWeek of 2025-04-01: 19 positiveWeek of 2025-04-01: 3 negativeWeek of 2025-05-01: 9 positiveWeek of 2025-05-01: 1 negativeWeek of 2025-06-01: 21 positiveWeek of 2025-06-01: 5 negativeWeek of 2025-07-01: 49 positiveWeek of 2025-07-01: 2 negativeWeek of 2025-08-01: 23 positiveWeek of 2025-09-01: 19 positiveWeek of 2025-09-01: 2 negativeWeek of 2025-10-01: 27 positiveWeek of 2025-10-01: 4 negativeWeek of 2025-11-01: 20 positiveWeek of 2025-11-01: 1 negativeWeek of 2025-12-01: 29 positiveWeek of 2025-12-01: 2 negativeWeek of 2026-01-01: 30 positiveWeek of 2026-01-01: 2 negativeWeek of 2026-02-01: 9 positiveWeek of 2026-02-01: 1 negativeWeek of 2026-03-01: 11 positiveWeek of 2026-04-01: 12 positiveWeek of 2026-04-01: 3 negativeWeek of 2026-05-01: 16 positiveWeek of 2026-06-01: 16 positiveWeek of 2026-06-01: 4 negativeWeek of 2026-07-01: 10 positiveWeek of 2026-07-01: 2 negativeWeek of 2026-08-01: 9 positive
Weekly review counts (Steam review histogram). Positive above the line, negative below.

Players online

5392026-08-11 18:00 — 23 players2026-08-12 10:00 — 28 players2026-08-13 02:00 — 30 players2026-08-13 18:00 — 25 players2026-08-14 09:00 — 35 players2026-08-15 01:00 — 24 players2026-08-15 17:00 — 29 players2026-08-16 09:00 — 38 players2026-08-17 01:00 — 27 players2026-08-17 17:00 — 30 players2026-08-18 09:00 — 39 players2026-08-19 00:00 — 14 players2026-08-19 16:00 — 29 players2026-08-20 08:00 — 53 players2026-08-21 00:00 — 24 players2026-08-21 15:00 — 51 players2026-08-22 07:00 — 40 players2026-08-22 23:00 — 11 players2026-08-23 15:00 — 53 players2026-08-24 06:00 — 30 players2026-08-24 22:00 — 17 players2026-08-25 14:00 — 49 players2026-08-26 06:00 — 33 players2026-08-26 23:00 — 9 players2026-08-27 15:00 — 44 players2026-08-28 07:00 — 32 players2026-08-28 23:00 — 15 players2026-08-29 15:00 — 45 players2026-08-30 05:00 — 32 players
Concurrent players, hourly average, last 30 days (census samples).

Price history

$2.99$0.492017-12-202023-09-192017-12-20 — best price $1.792018-02-15 — best price $0.992018-03-24 — best price $0.992018-05-31 — best price $1.392018-07-05 — best price $1.992018-09-20 — best price $1.992018-11-01 — best price $1.992018-11-19 — best price $1.992018-11-27 — best price $1.992019-01-03 — best price $1.992019-02-11 — best price $1.992019-03-05 — best price $0.992019-05-16 — best price $0.992019-05-26 — best price $0.792019-06-26 — best price $0.492019-07-23 — best price $1.492019-09-27 — best price $0.992019-10-28 — best price $0.692019-11-26 — best price $0.992019-12-19 — best price $0.492020-01-17 — best price $0.992020-03-18 — best price $0.492020-04-01 — best price $1.992020-07-09 — best price $1.992020-07-18 — best price $0.492020-09-14 — best price $0.992020-10-29 — best price $1.392020-11-16 — best price $0.992020-11-25 — best price $0.992020-12-22 — best price $0.492021-01-11 — best price $0.492021-02-11 — best price $0.492021-03-08 — best price $0.492023-09-19 — best price $2.99
Lowest recorded price across tracked stores, per day (census snapshots).

Completion

60+
achievements tracked
79%
earned "Q"
29.8%
median achievement earned by

Global achievement rates from Steam.

Details

WindowsmacOSLinuxSingle-playerSteam AchievementsSteam CloudFamily Sharing

15 supported languages: English, French, German, Spanish - Spain, Japanese, Korean, Portuguese - Portugal, Portuguese - Brazil, Russian, Simplified Chinese, Spanish - Latin America, Traditional Chinese…

Player tags

IndieCasualPuzzleAbstractRelaxingStrategyMinimalistAtmospheric

Census log

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

Players also track

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Similarity via IGDB.

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