The Game Census
Ultimate Sudoku Collection cover art

Ultimate Sudoku Collection

Stanley Lam · 2018-05-18

Steam

CasualFree To PlayIndie

Modes: Single player

Releases: May 18, 2018 (PC (Microsoft Windows)), May 18, 2018 (Mac)

The best Sudoku game on Steam.

Ultimate Sudoku Collection is a 2018 Casual Free To Play Indie game priced at free-to-play, with an estimated 50,000 .. 100,000 owners and a Mostly Positive review sentiment (77% of 198 reviews).

4
playing now
77%
positive of 198 reviews
Mostly Positive
steam's rating (official)
50,000–100,000
owners (SteamSpy est.)
pending
deck/linux tier (ProtonDB)
Verified
Steam Deck (Valve)
SteamOS: Playable
Free
steam price (US)

4 players in-game as of 2026-10-14 19:00 UTC (census sample)

Health check

Quiet
  • · 4 players in-game at the last census sample.
  • · 14 reviews in the last 8 weeks (~2/week).
  • · Review velocity up 0% vs the prior 8 weeks.
  • · Top 21% of 29,131 Casual games in the census by review count.

Health tier since 2026-09-01

Review momentum

PositiveNegative
171720182026Week of 2018-05-01: 17 positiveWeek of 2018-05-01: 9 negativeWeek of 2018-06-01: 1 positiveWeek of 2018-06-01: 1 negativeWeek of 2018-07-01: 3 positiveWeek of 2018-07-01: 2 negativeWeek of 2018-08-01: 2 positiveWeek of 2018-08-01: 1 negativeWeek of 2018-10-01: 2 positiveWeek of 2018-11-01: 2 positiveWeek of 2018-12-01: 1 positiveWeek of 2019-01-01: 1 negativeWeek of 2019-03-01: 1 positiveWeek of 2019-04-01: 2 positiveWeek of 2019-05-01: 3 negativeWeek of 2019-06-01: 2 positiveWeek of 2019-06-01: 1 negativeWeek of 2019-07-01: 3 positiveWeek of 2019-07-01: 1 negativeWeek of 2019-08-01: 2 positiveWeek of 2019-09-01: 2 positiveWeek of 2019-11-01: 3 positiveWeek of 2019-11-01: 1 negativeWeek of 2019-12-01: 1 positiveWeek of 2020-01-01: 1 positiveWeek of 2020-01-01: 1 negativeWeek of 2020-03-01: 1 positiveWeek of 2020-03-01: 1 negativeWeek of 2020-04-01: 4 positiveWeek of 2020-05-01: 4 positiveWeek of 2020-06-01: 8 positiveWeek of 2020-06-01: 2 negativeWeek of 2020-07-01: 2 positiveWeek of 2020-08-01: 2 positiveWeek of 2020-10-01: 3 positiveWeek of 2020-11-01: 1 positiveWeek of 2020-11-01: 1 negativeWeek of 2020-12-01: 4 positiveWeek of 2020-12-01: 2 negativeWeek of 2021-03-01: 3 positiveWeek of 2021-03-01: 2 negativeWeek of 2021-04-01: 2 positiveWeek of 2021-04-01: 1 negativeWeek of 2021-06-01: 4 positiveWeek of 2021-06-01: 1 negativeWeek of 2021-07-01: 1 positiveWeek of 2021-08-01: 1 positiveWeek of 2021-09-01: 1 positiveWeek of 2021-10-01: 1 positiveWeek of 2021-11-01: 1 positiveWeek of 2021-11-01: 1 negativeWeek of 2021-12-01: 5 positiveWeek of 2022-01-01: 2 positiveWeek of 2022-01-01: 1 negativeWeek of 2022-02-01: 1 positiveWeek of 2022-03-01: 1 positiveWeek of 2022-04-01: 2 negativeWeek of 2022-05-01: 2 positiveWeek of 2022-06-01: 3 positiveWeek of 2022-06-01: 1 negativeWeek of 2022-08-01: 5 positiveWeek of 2022-08-01: 1 negativeWeek of 2022-09-01: 2 positiveWeek of 2022-11-01: 1 positiveWeek of 2023-01-01: 2 positiveWeek of 2023-02-01: 1 positiveWeek of 2023-04-01: 1 negativeWeek of 2023-05-01: 1 positiveWeek of 2023-06-01: 1 positiveWeek of 2023-06-01: 2 negativeWeek of 2023-07-01: 2 positiveWeek of 2023-08-01: 2 positiveWeek of 2023-09-01: 1 positiveWeek of 2023-09-01: 1 negativeWeek of 2023-10-01: 1 negativeWeek of 2023-11-01: 2 positiveWeek of 2023-12-01: 3 positiveWeek of 2024-02-01: 5 positiveWeek of 2024-03-01: 1 positiveWeek of 2024-05-01: 2 positiveWeek of 2024-06-01: 2 positiveWeek of 2024-06-01: 1 negativeWeek of 2024-07-01: 3 positiveWeek of 2024-08-01: 2 positiveWeek of 2024-08-01: 1 negativeWeek of 2024-09-01: 1 positiveWeek of 2024-09-01: 1 negativeWeek of 2024-10-01: 1 positiveWeek of 2024-10-01: 1 negativeWeek of 2024-11-01: 1 positiveWeek of 2024-11-01: 1 negativeWeek of 2025-01-01: 2 positiveWeek of 2025-02-01: 2 positiveWeek of 2025-03-01: 2 positiveWeek of 2025-04-01: 1 positiveWeek of 2025-04-01: 1 negativeWeek of 2025-05-01: 1 positiveWeek of 2025-06-01: 1 positiveWeek of 2025-08-01: 3 positiveWeek of 2025-09-01: 1 positiveWeek of 2025-11-01: 1 positiveWeek of 2025-12-01: 3 positiveWeek of 2026-01-01: 1 positiveWeek of 2026-02-01: 1 positiveWeek of 2026-02-01: 1 negativeWeek of 2026-04-01: 2 positiveWeek of 2026-05-01: 2 positiveWeek of 2026-06-01: 2 positiveWeek of 2026-07-01: 1 negativeWeek of 2026-08-01: 2 positive
Weekly review counts (Steam review histogram). Positive above the line, negative below.

Players online

802026-09-15 04:00 — 3 players2026-09-16 12:00 — 0 players2026-09-17 20:00 — 4 players2026-09-19 03:00 — 4 players2026-09-20 11:00 — 3 players2026-09-21 19:00 — 5 players2026-09-23 02:00 — 8 players2026-09-24 10:00 — 2 players2026-09-25 17:00 — 4 players2026-09-27 01:00 — 2 players2026-09-28 08:00 — 6 players2026-09-29 16:00 — 6 players2026-09-30 23:00 — 7 players2026-10-02 07:00 — 1 players2026-10-03 14:00 — 4 players2026-10-04 22:00 — 2 players2026-10-06 06:00 — 2 players2026-10-07 13:00 — 0 players2026-10-08 21:00 — 4 players2026-10-10 04:00 — 2 players2026-10-11 12:00 — 4 players2026-10-12 20:00 — 0 players2026-10-14 03:00 — 4 players2026-10-14 19:00 — 4 players
Concurrent players, hourly average, last 30 days (census samples).
262May 2018Aug 2026May 2018 — avg 26 · peak 51Aug 2018 — avg 8 · peak 21Nov 2018 — avg 3 · peak 10Feb 2019 — avg 3 · peak 10May 2019 — avg 2 · peak 9Aug 2019 — avg 2 · peak 5Nov 2019 — avg 4 · peak 11Feb 2020 — avg 4 · peak 10May 2020 — avg 7 · peak 16Aug 2020 — avg 4 · peak 10Nov 2020 — avg 5 · peak 12Feb 2021 — avg 4 · peak 12May 2021 — avg 5 · peak 12Aug 2021 — avg 6 · peak 19Nov 2021 — avg 9 · peak 15Feb 2022 — avg 7 · peak 15May 2022 — avg 6 · peak 13Aug 2022 — avg 5 · peak 15Nov 2022 — avg 5 · peak 12Feb 2023 — avg 4 · peak 12May 2023 — avg 5 · peak 15Aug 2023 — avg 4 · peak 12Nov 2023 — avg 6 · peak 12Feb 2024 — avg 5 · peak 11May 2024 — avg 5 · peak 11Aug 2024 — avg 5 · peak 12Nov 2024 — avg 4 · peak 11Feb 2025 — avg 5 · peak 11May 2025 — avg 3 · peak 9Aug 2025 — avg 2 · peak 7Nov 2025 — avg 4 · peak 9Apr 2026 — avg 2 · peak 9Jul 2026 — avg 4 · peak 14Aug 2026 — avg 3 · peak 12
Monthly average players (source: steamcharts.com) — history via steamcharts.com; live census sampling since Aug 2026.

Completion

60+
achievements tracked
35.8%
earned "Basic Rookie"
3.7%
median achievement earned by

Global achievement rates from Steam.

Details

WindowsmacOSSingle-playerSteam AchievementsFamily Sharing27 DLC

1 supported languages: English

Post-launch support: 27 DLC released, first 2018-05-18, latest 2020-11-30 (Steam store data)

Player tags

IndieCasualPuzzleDifficultBoard GameFree to Play

Census log

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

Players also track

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Similarity via IGDB.