Screenshots
Watch trailer on Steam ↗Sudoku Killer / 杀手数独
Konstructors · Published by Hook Games · Official site ↗
Very Positive — 89% positive (246 reviews) · 4 achievements
Last updated 27 Sept 2026
Killer Sudoku (Sumdoku/Mathdoku/Addoku) puzzles include all the rules of regular Sudoku, but add in dashed-line 'cages', which must sum to given values. This great brain exerciser will provide you many hours of new Sudoku experience and be nice addition to your puzzle collection.
DJCTQ l
£2.49
Lowest price we've ever recorded
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£2.49
Price history
3 Sept 2026Lowest: £2.49 · Highest: £2.492 Oct 2026
Indie, Strategy, Casual · 2018 · More under £5 games
Dive into Killer Sudoku's strategic puzzle world where every number has a sum to find. Challenge yourself in this unique blend of logic and arithmetic from Konstructors, released in 2018.
About this game
Sudoku (数独 sūdoku, digit-single) - is a logic-based, combinatorial number-placement puzzle. The objective is to fill a 9×9 grid with digits so that each column, each row, and each of the nine 3×3 subgrids that compose the grid (also called "boxes", "blocks", or "regions") contains all of the digits from 1 to 9.
Killer Sudoku puzzles include all the rules of regular Sudoku but add in dashed-line 'cages' which must sum to given values. Killer Sudoku is also sometimes known as Sumdoku, Mathdoku or Addoku.
The name 'Killer' Sudoku arises because of the wicked twist on the standard Sudoku puzzle, since you must not only place each of the numbers 1 to 9 (or 1 to the size of the puzzle) into each of the rows, columns and bold-lined 3x3 (or other size) boxes but you must also place the numbers into each dashed-line cage so that they add up to its given total - and without repeating a digit in a dashed-line cage. ©
Killer Sudoku puzzles include all the rules of regular Sudoku but add in dashed-line 'cages' which must sum to given values. Killer Sudoku is also sometimes known as Sumdoku, Mathdoku or Addoku.
The name 'Killer' Sudoku arises because of the wicked twist on the standard Sudoku puzzle, since you must not only place each of the numbers 1 to 9 (or 1 to the size of the puzzle) into each of the rows, columns and bold-lined 3x3 (or other size) boxes but you must also place the numbers into each dashed-line cage so that they add up to its given total - and without repeating a digit in a dashed-line cage. ©
- 100 killer Sudoku Killer puzzles
- Level's progress save
- Beautiful minimalist design, multiple color themes
- 10 ambient relaxing soundtracks
- Steam Achievements
- Trading Cards, Badge, Emoticons and Backgrounds (Coming soon)
- Cross-platform Steam Cloud saves
- As always - Windows, Mac and Linux support
System Requirements
Will my PC run this? →Minimum
Minimum:
- OS *: Windows 7+
Supported Languages
English*, German*, Japanese*, Portuguese - Portugal*, Portuguese - Brazil*, Russian*, Simplified Chinese*, Traditional Chinese*, Turkish*, Ukrainian*, French*, Spanish - Spain*, Finnish*, Korean*, Spanish - Latin America*, Swedish*
*languages with full audio support
*languages with full audio support
Latest news
AnnouncementsOfficial
Hook Games - Spring Sale 50% OFF
https://cdn.akamai.steamstatic.com/steamcommunity/public/images/clans/38245069/827af6b77610cc07710ee2d3c45f19de964b46af.jpg Hey everyone! Enjoy our Spring discounts 50% OFF (don't forget to follow dev page!) https://store.steampowered.com/publisher/hook Anomaly Hunter - Wishlist! New demo will be available soon, wishlist it to stay tuned. Really helps us a lot. https://store.steampowered.com/app/1301820/Anomaly_Hunter/ Nestor, Hook GamesRead full article on Community Announcements (hook.gg)AnnouncementsOfficial
Anomaly Hunter - Pancake Week
https://cdn.akamai.steamstatic.com/steamcommunity/public/images/clans/38245069/b1a5139f837cee422de03cc0dee4d277fadf5711.png Hey everyone! We participate in Pancake Week event: https://store.steampowered.com/sale/pancakeweek Pancake week isn’t just yet another festival; it is a way to celebrate Slavic traditions with the rest of the world on Steam! From March 8th to March 14th, 2021, you’ll be able to choose among our selection of more than 200 games. Try out exciting upcoming titles, discover more obscure productions, relive timeless classics. Simply join us in celebrating some of the best video games that the Eastern European development scene has to offer! Best support - wishlist! https://store.steampowered.com/app/1301820/Anomaly_Hunter/ Your Best, Hook GamesRead full article on Community Announcements (hook.gg)Community & EventsOfficial
Anomaly Hunter - THE BIG ADVENTURE EVENT
https://cdn.cloudflare.steamstatic.com/steamcommunity/public/images/clans/38245069/da5c07da84a5a494dbfb518e2caa7a57df7c307e.jpg Hey everyone, Hope you all doing good. Haven't posted anything in a while, many projects to work on. We almost finished Anomaly Hunter, drawing last cutscenes and preparing new demo before launch, so stay tuned ;) Anomaly Hunter will participate in The Big Adventure Event, January 21 - 25, so feel free to join stream anytime and ask questions. Our Discord: https://discord.gg/nC3qWJah Your best, Nestor from Hook GamesRead full article on Community Announcements (hook.gg)AnnouncementsOfficial
Anomaly Hunter - Indie Cup Aesthetic Experiences
https://steamcdn-a.akamaihd.net/steamcommunity/public/images/clans/38245069/3996e79c5785b43041486c554f23740355ab3f22.png Hey everyone! Anomaly Hunter participated in Indie Cup contest, got our spot in "Aesthetic Experiences" category. Great thanks to whole Indie Cup team for contest and sale organization. Play Anomaly Hunter demo along with other great indie games on Indie Cup sale page: https://store.steampowered.com/sale/indiecup https://store.steampowered.com/app/1301820/Anomaly_Hunter/Read full article on Community Announcements (hook.gg)AnnouncementsOfficial
Sorry, James / WayOut - 50% OFF deal
https://steamcdn-a.akamaihd.net/steamcommunity/public/images/clans/38245069/10059cf5ba723fcabd9c4be8631d669131fc8097.gif Follow Hook Games dev page. Our first game - Wayout - beautiful mind-teaser: https://store.steampowered.com/app/551110/Wayout/ Sorry, James - non-linear story-driven puzzle: https://store.steampowered.com/app/659190/Sorry_James/ Wishlist adventure about time-travelling detective - Anomaly Hunter https://store.steampowered.com/app/1301820/Anomaly_Hunter/?curator_clanid=38245069 Follow Hook Games dev page to stay updated about new releases and discounts.Read full article on Community Announcements (hook.gg)
