
Fill elegant diagrams with the correct numbers using three simple rules. Rondoku invites you to think, take your time, and enjoy beautifully hand-crafted challenges.
Modeled estimate, not a reported figure. How we estimate →
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About
Simple Rules, Deep LogicFill circular puzzles with the correct numbers using just three simple rules. Rondoku is a calm and minimalist logic game that invites you to slow down, think carefully, and find satisfaction in clever solutions.

Every puzzle in Rondoku is designed by hand. With 70 unique levels, the game offers a thoughtful difficulty curve and a sense of intention in every diagram.
Inspired by classic puzzle magazines, Rondoku is presented as a book. Flip through its pages freely and enjoy the quiet satisfaction of solving each puzzle, one by one, until the book is complete.
Stats
All-time low is the lowest price we've recorded for this game since we started tracking it.
Languages: English, French, German, Japanese, Korean, Portuguese - Brazil, Russian, Simplified Chinese, Spanish - Latin America, Traditional Chinese, Turkish
Engagement
Hours played at review time, across 25 reviews with recorded playtime.
Reviews
魔改造数独 「簡単じゃん」と油断していたらじりじりと難易度が上がって気づいたらずっとやっている BGMはセルフサービス 数独を無限にできるタイプの人にはとてもおすすめ
好玩好玩
[h1]独特的环数独体验,快来一起长脑子吧[/h1] 在这个电子化严重的时代中,我们也许应该静下心来,感受一下16世纪起源的数学游戏——数独。 《环数独》在数独的基础上,将3*3的数字棋盘,变成了一个又一个的圆环,70个独特的关卡,环环相扣的魅力,既要完成这个圆环的填写,又要确保相扣的圆环中,不能使其重复。 这里的重复指的是一条线上不能重复,隔壁相连的不能重复, 圆环套圆环不能重复,不能重复,就是数独的巧妙之处,非常锻炼脑子。在复杂关卡,你需要初步填写后不断修正,既要考虑之前的逻辑关系,又不能破坏规则。玩完一局,感觉都长脑子了!!! 每次通关结束后,一朵独特的莲花标记展示于此,就像一句经典的话语“一步一莲花”,你的每次成功通关,带来的都是心灵的平静,是你对整个游戏的思考,是你破解一道谜题的欣喜。 巧妙、独特、有趣,快来体验《环数独》的乐趣吧! [quote]欢迎前来关注「 [url=https://steamcommunity.com/groups/35307916/]品游拾光鉴赏组」[/url] [u][b] 品味欢乐游戏,拾取快乐时光。[/b][/u][/quote]
A very interesting twist on the Sudoku formula, highly recommended. Unfortunately, the last puzzle is a massive difficulty spike that really soured my experience, and now the spectre of near-completion hangs over the game for me.
ちょうどいい難易度でちょっとだけやるかぁ~に最適です!
Great game, very worth it if you are a fan of Sudoku. Unique concept with fun puzzles to solve.
J'ai perdu la notion du temps avec ça xD , 10/10
A surprisingly deep Sudoku-like that I would easily recommend to anybody who enjoys simple (but increasingly challenging) puzzle games. I don't even like Sudoku!
Jogo viciante que da uma cozida gostosa na cabeça e vc nao consegue parar
It’s sudoku with a simple but effective twist. I don’t have much else to say. Definitely more fun to look at than sudoku.
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Trends
Concurrent players on Steam, sampled daily since tracking started.
Audience
Estimated from the language of this game's reviews — a proxy for where players are, not official Steam demographics.
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