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Sudoku Zenkai / 数独全卡

Sudoku Zenkai / 数独全卡

Sudoku Zenkai is a game for everyone, from beginning to advanced players. It brings a new dimension to sudoku - you can solve puzzles with your friends, wherever they are! You can start a new puzzle with a friend or call one over to help when you get stuck.

Released Apr 2, 2018 Developer ImaginationOverflow Publisher ImaginationOverflow Platforms Windows · Mac · Linux LogicSolitaireOnline Co-OpChessCasual
View on Steam ↗ $3.99 (US · as of 2026-09-28)

What players say

Steam review score and the most-helpful voices, which may include critical ones. Score via Steam as of 2026-09-27.

90.6%positive213 reviews
Recommended · 0 found this helpful

“If you're a newbie to Sudoku, this is a nice game. Though if you're looking for a challenge, skip to difficulty "Insane" or "Zenkai" right away. First three diffs are a nice introduction. Then it's relying on your eyes and deduction skills. ZENKAI difficulty is the one, where…”

— a player, Steam review · 13 hrs played
Read more reviews ↗

Player activity

Monthly average concurrent players. Live data self-collected from the Steam API · history through 2026-08 via SteamCharts.

123all-time peak
0 5 10 2019 2021 2023 2025 No data collected for this period No data collected for this period 8 avg · Feb 2021

Achievement stats

Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-09-27.

57achievements
13.4%median completion
4.2%rarest: SudoCo-Op V
70.1% of players 54.8% of players 42.6% of players 42.4% of players 39.8% of players 37.8% of players 37.0% of players 33.8% of players 33.2% of players 29.0% of players 28.4% of players 27.0% of players 26.2% of players 23.7% of players 21.4% of players 20.0% of players 19.1% of players 18.8% of players 18.6% of players 18.0% of players 17.5% of players 16.8% of players 16.6% of players 15.5% of players 15.3% of players 15.3% of players 14.9% of players 13.7% of players 13.4% of players 13.1% of players 12.9% of players 12.0% of players 11.2% of players 10.7% of players 10.7% of players 10.5% of players 10.1% of players 9.8% of players 9.8% of players 9.1% of players 8.8% of players 8.4% of players 8.1% of players 8.0% of players 7.7% of players 7.6% of players 7.6% of players 7.5% of players 7.1% of players 6.6% of players 6.4% of players 6.3% of players 6.2% of players 6.0% of players 5.7% of players 5.5% of players 4.2% of players 70.1% 0% most earned rarest
Almost everyone has
70.1%A step for Sudokind — Completed 1 game.
54.8%Mental Annotation — Completed a game without using annotations.
42.6%Daily Teaser — Completed a daily challenge.
Rarest badges of honor
4.2%SudoCo-Op V — Played 50 games with a friend.
5.5%Social Zenkai — Shared 20 games.
5.7%Social Challenger — Shared 15 games.

Price tracking

US-region pricing (USD), sampled twice daily by our own tracker since 2026-09-28. Steam prices vary by region — always confirm your local price on Steam.

$3.99current · sampled 2026-09-28 23:18 UTC
$3.99lowest since tracking began2026-09-28
US3.99 USD
EU3.99 EUR
UK3.39 GBP
Australia5.95 AUD
Canada4.99 CAD
Japan470 JPY
Brazil13.79 BRL
China18.00 CNY

Regional prices at last sample, in local currency — Steam sets each region's price independently.

Brazil≈$2.7 China Japan Canada US Australia UK EU≈$4.5

Cheapest → most expensive, converted to USD at ECB reference rates (2026-09-28). Relative comparison only.

Latest official news

Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.

Feb 26, 2024
Oirbo update time! 0.9.26 changelog.

https://clan.akamai.steamstatic.com/images/33026109/d179a279727ebe43011fe8cfbe267c531ba10e59.gif Hi everyone \o Sorry for the 2-week break in updates. We've been spending all this time working Steam I

Aug 18, 2023
Oirbo, Mechanical Mayhem update is live!

Hi everyone, We just released a huge update to our most recent game, Oirbo! You can check it out now on Oirbo! https://store.steampowered.com/app/1074280/Oirbo/

Jul 19, 2023
Oirbo is finally available!!!

https://store.steampowered.com/app/1074280/Oirbo/ Hi everyone It's with great pleasure that we finally announce the release of Oirbo, you can get it now on Steam! The game is not yet finished, at leas

Jun 29, 2023
Oirbo releases on the 19th of July!

Hi everyone! It is with great pleasure that we announce that Oirbo will be released on Early Access on July 19th! It's been a tough (almost 5 years) of development, and even though the game isn't 100%

Nov 30, 2022
Sudoku Zenkai update available on all platforms

Hi everyone, We are happy to announce that Sudoku Zenkai is finally online on all platforms! Cross-Play is now enabled too, so you can play with your friends no matter the platform they are playing at

Screenshots

Official Steam store screenshots — click any shot to enlarge.

Facts & details

From the Steam store record, snapshot 2026-09-27.

GenresCasual, Indie, Strategy
Player tagsLogic · Solitaire · Online Co-Op · Chess · Casual · Difficult · Relaxing · Minimalist · Point & Click · Tabletop · 2D · Strategy (Steam store community voting)
FeaturesSingle-player · Multi-player · Co-op · Online Co-op · Cross-Platform Multiplayer · Steam Achievements · Steam Trading Cards · Color Alternatives
LanguagesEnglish, Spanish - Spain, Portuguese - Portugal, French, Polish, Japanese, Portuguese - Brazil, Simplified Chinese, Czech, Russian, Spanish - Latin America
Achievements57
Official sitehttps://sudokuzenkai.imaginationoverflow.com
Minimum system requirements (PC)

Minimum: OS *: Windows 7+ Processor: 2.0Ghz+ Memory: 1 GB RAM Storage: 150 MB available space