Screenshots
Watch trailer on Steam ↗Sudoku Classic
RucKyGAMES · Published by RucKyGAMES · Official site ↗
Very Positive — 92% positive (50 reviews) · 14 achievements
Last updated 27 Sept 2026
Customizable Sudoku with the feel of writing with a pen on paper and the ease of playing a video game.It's a game, but you can play it as if you were writing with a pen on a piece of paper.You can customize the assist function to your liking.
-25%
£4.11
£5.49Lowest price we've ever recorded
View on SteamPrices can lag the live Steam store — always confirm before buying.
£4.11£5.49
Price history
3 Sept 2026Lowest: £4.11 · Highest: £4.117 Oct 2026
Indie, Casual · 2023 · More under £5 games
Experience Sudoku Classic by RucKyGAMES, where you can tailor your puzzle-solving journey with customizable assist features. Dive into a unique blend of traditional pen-and-paper gameplay and modern gaming convenience launched in 2023.
About this game
Customizable Sudoku with the feel
of writing with a pen on paper
and the ease of playing a video game.
It's a video game, but you can play it as if you were writing with a pen on paper.
You can customize the assist functions to your liking.
* Customize the assist functions and play with the settings you like.
Customize the assist functions to play with the settings you like.
We wanted to retain the feel of playing with pen and paper, but make it easier to play...!
...and other assist functions you can turn on/off any way you like.
*The game can be played anytime, anywhere, even if it takes a long time.
* Touch controls are supported.
Touch controls make it easy to play casually like you would on a smartphone app.
* There are a total of 300 problems in EASY, NORMAL, and HARD difficulty levels.
There are 300 problems in three difficulty levels: EASY, NORMAL, and HARD.
of writing with a pen on paper
and the ease of playing a video game.
It's a video game, but you can play it as if you were writing with a pen on paper.
You can customize the assist functions to your liking.
* Customize the assist functions and play with the settings you like.
Customize the assist functions to play with the settings you like.
We wanted to retain the feel of playing with pen and paper, but make it easier to play...!
...and other assist functions you can turn on/off any way you like.
*The game can be played anytime, anywhere, even if it takes a long time.
* Touch controls are supported.
Touch controls make it easy to play casually like you would on a smartphone app.
* There are a total of 300 problems in EASY, NORMAL, and HARD difficulty levels.
There are 300 problems in three difficulty levels: EASY, NORMAL, and HARD.
System Requirements
Will my PC run this? →Minimum
Minimum:
- Requires a 64-bit processor and operating system
- OS: WIndows8/10
- Processor: 2.0GHz
- Memory: 4 MB RAM
- Storage: 1 GB available space
Recommended
Recommended:
- Requires a 64-bit processor and operating system
Supported Languages
English, Japanese, French, Italian, German, Spanish - Spain, Portuguese - Portugal, Simplified Chinese, Traditional Chinese, Korean
Latest news
AnnouncementsOfficial
Sudoku Classic Passes SteamDeck Compatibility Review!
Thank you for enjoying Sudoku Classic. On May 26, 2026, Sudoku Classic passed SteamDeck compatibility review and was confirmed to run smoothly on Steam Deck. Thank you very much to all the users who submitted reviews to the article "Sharing information about SteamDeck compatibility." Valav has created a wonderful landing page for Sudoku Classic! Please check it out if you'd like. https://store.steampowered.com/verified/2286760/_Classic {STEAM_CLAN_IMAGE}/43614169/122d90f4440deef288294bd863b040ce602d3f56.pngRead full article on Community Announcements (Ransei.RucKyGAMES)AnnouncementsOfficial
【 Bundle 】"Sudoku Classic" and new game "Sudoku Relax"
Thank you for playing "Sudoku Classic". On November 19, 2025, RucKyGAMES began distributing "Sudoku Relax". The order in which the games were developed was "Sudoku Relax" first, followed by "Sudoku Classic." https://store.steampowered.com/app/3364940/Relax/ {STEAM_CLAN_IMAGE}/43614169/33ba5e5494eac526a82de5f8aa37d902f9e39088.png{STEAM_CLAN_IMAGE}/43614169/3fd6d907cae6e7124e18aae4b28d28c5f7c9cbb9.png{STEAM_CLAN_IMAGE}/43614169/9602761b4a11fa1cc46ee79289c891d5891539dd.png Relax is too easy! You can't enter incorrect numbers! Based on these reviews, we developed "Sudoku Classic," which allows players to customize the way they play to their liking. Relax is what we call the "Beginner play style" in Classic. "Sudoku Relax" is a Sudoku puzzle where you choose a number and then choose the square you want to fill in. This allows you to fill in numbers more intuitively. When the numbers you have entered match, effects will be applied to create a gorgeous effect on the board. The background music, which has been composed to help you think calmly, will create an even more comfortable atmosphere. 【Price】 $4.99 / €5.09 【Number of players】 1 person 【Supported languages】 Japanese, English, German, Simplified Chinese 💐INotice of bundle sales with "Sudoku Classic"! f you have "Sudoku Classic", get 10% off "Sudoku Relax"! https://store.steampowered.com/bundle/62810/Classic__Relax/ {STEAM_CLAN_IMAGE}/43614169/5c33e010af94b492c0b9adbda07f1d879e16e79c.jpg If you have "Sudoku Classic", you can get an additional discount on the "Sudoku Relax" launch discount of 10% in a bundle! *Sample images are in Japanese and Japanese currency.Read full article on Community Announcements (Ransei.RucKyGAMES)AnnouncementsOfficial
(A comfortable Sudoku game) Sudoku Relax [ Launch sale 10% off!! ]
RucKyGAMES (https://ruckygames.com/) The Steam® version of "Sudoku Relax" was released today, November 19, 2025. https://clan.akamai.steamstatic.com/images/44047080/817146a5f1cf8531b90643f2001feedebc3521a1.jpg ✨️Sudoku Relax✨️ Intuitive operation: select numbers and then enter them "Sudoku Relax" is a Sudoku puzzle where you choose a number and then choose the square you want to fill in. This allows you to fill in numbers more intuitively. Effects and sounds so comfortable you might fall asleep When the numbers you have entered match, effects will be applied to create a gorgeous effect on the board. The background music, which has been composed to help you think calmly, will create an even more comfortable atmosphere. 【Title】Sudoku Relax 【Release Date】November 19, 2025 【Price】$4.99 / €5.09 【Players】1 Player 【Supported Languages】Japanese, English, German, Simplified Chinese https://store.steampowered.com/app/3364940/_Relax/ 💐 Launch sale 10% off!!💐 【Discount】10％ 【Duration】2 weeks (November 19 - December 2, 2025) *The discount period may vary depending on your region. Thank you for your understanding. 🎵Sudoku Relax 1&2&3&4&5 -Soundtrack-🎵Bundle sale 30% off!! 🎵 The BGM for the "Sudoku Relax" series is popular for its combination of the gameplay of "Sudoku" and "Relaxation," which makes it easy to fall asleep. A soundtrack that compiles the background music from the series "Sudoku Relax," which will be released on Steam®, and the series that is already available on Nintendo Switch™, will be released on the same day as the game. 【Titles Included】 Sudoku Relax Sudoku Relax 2 Summer Waves Sudoku Relax 3 Autumn Leaves Sudoku Relax 4 Winter Snow Sudoku Relax 5 Full Bloom 【Songs Included】20 songs (Color Gradient, Time Step, Rose & Lily, Spider Strings, etc.) 【Release Date】November 19, 2025 【Price】$6.99 / €6.99） https://store.steampowered.com/app/4091380/_Relax_Soundtrack/ 🌼Bundle sale 30% off!! 🌼 https://store.steampowered.com/bundle/62751/Relax__Relax_Soundtrack/ https://cl...Read full article on Community Announcements (Ransei.RucKyGAMES)AnnouncementsOfficial
【 Bundle 】"Sudoku Classic" and new game "Add Cross"
Thank you for playing "Sudoku Classic". On October 22, 2025, RucKyGAMES began distributing "Add Cross". {STEAM_CLAN_IMAGE}/43614169/f55cf41d7476172b229979be009fc68c193974fe.png {STEAM_CLAN_IMAGE}/43614169/c1fb334bb04c4192242be828783eee6376d04569.png "Add Cross" is a pencil puzzle where you play by putting the numbers 1～9 inside the empty squares so that they become the numbers in the hint squares. Let's play casually with light effects! https://store.steampowered.com/app/3899090/_/ 【Price】 $2.99 【Number of players】 1 person 【Supported languages】 Japanese, English, French, German, Italian, Spanish, Portuguese, Chinese (simplified), Chinese (traditional), Korean Notice of bundle sales with "Sudoku Classic"! If you have "Sudoku Classic", get 10% off "Add Cross"! How about a pencil puzzle that is different from Sudoku? https://store.steampowered.com/bundle/61019/Classic/ If you have "Sudoku Classic", you can get an additional discount on the "Add Cross" launch discount of 10% in a bundle!Read full article on Community Announcements (Ransei.RucKyGAMES)AnnouncementsOfficial
Distribution starts on 10/22! "Add Cross"【10% off launch sale】
https://clan.fastly.steamstatic.com/images/44047080/658802e5a1eadda64fe5512bb950d551759f9d93.png On October 22, 2025, RucKyGAMES began distributing "Add Cross". https://clan.fastly.steamstatic.com/images/44047080/705469e0f29a650a4090931d81faa854eac8292d.png 『Add Cross』 is a pencil puzzle where you play with the numbers 1～9 inside the empty squares so that they become the numbers in the hint squares. Let's play casually with light effects! What is "Add Cross"? - Numbers are written in "vertical hint squares" and "horizontal hint squares". - Up to 1～9 numbers can be placed in one connected "blank square". The same numbers do not fit. - squares interrupted by "hint squares" can have the same number. - If you put numbers in all squares except the "hint square", it's clear! https://clan.fastly.steamstatic.com/images/44047080/ca3b7aabbe6c6eb4860983789687dba5c28e898a.png 【Price】 $2.99 【Number of players】 1 person 【Supported languages】 Japanese, English, French, German, Italian, Spanish, Portuguese, Chinese (simplified), Chinese (traditional), Korean 【Rights notation】 ©RucKyGAMES 【Store URL】 https://store.steampowered.com/app/3899090/_/ Launch Sale 10% Off Launch Sale to Celebrate Release! 【discount rate】 10% 【Duration 】22 October～ 5 November (Dates and times vary by region)Read full article on Community Announcements (Ransei.RucKyGAMES)
