Killer Sudoku

384 reviews
Content rating
USK: All ages
10K+
Downloads
Content rating
USK: All ages
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About this game

Presented by Cracking The Cryptic, the most popular Sudoku channel, comes a new game based on our most requested variant: Killer Sudoku.

In Killer Sudoku, every puzzle features cages that tell you the sum of the numbers inside. This extra information leads to beautiful logic that you will master as you progress through our handmade puzzles. The puzzles in Killer Sudoku are created by Simon and Mark as well as a large number of guest creators. Fans of Cracking the Cryptic's channel will recognize many of these authors as some of the most talented creators working today!

As with our other games (‘Classic Sudoku’, ‘Sandwich Sudoku’, ‘Chess Sudoku’, 'Thermo Sudoku' and 'Miracle Sudoku'), Simon Anthony and Mark Goodliffe (the hosts of Cracking The Cryptic) have written all the hints for the puzzles. So you know that every puzzle has been play-tested by a human being to ensure that each sudoku is interesting and fun to solve.

In Cracking The Cryptic’s games, players start with zero stars and earn stars by solving puzzles. The more puzzles you solve, the more stars you earn and the more puzzles you get to play. Only the most dedicated (and cleverest) sudoku players will finish all the puzzles. Of course the difficulty is carefully calibrated to ensure lots of puzzles at every level (from easy through to extreme). Anyone familiar with their channel will know that Simon and Mark take pride in teaching viewers to be better solvers and, in these games, they always craft the puzzles with the mindset of trying to help solvers improve their skills.

Mark and Simon have both represented the UK many times at the World Sudoku Championship and you can find more of their puzzles (and lots of others) on the internet’s biggest sudoku channel Cracking The Cryptic.

Features:
100 beautiful puzzles
15 bonus beginner puzzles
Hints crafted by Simon and Mark!
Handcrafted Killer Sudoku puzzles by the most popular Sudoku channel!
Updated on
May 5, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • No data shared with third parties
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  • No data collected
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Ratings and reviews

355 reviews
Kai Kunstmann
December 19, 2022
While the puzzles are quite enjoyable, using the app is not. The app tends to freeze up, and in doing so, it would often freeze up the entire system, to the point where you have to restart your phone. I can only imagine, that there is some nasty multi-threading bug, that spins up too many threads or executes an aggressive busy-waiting loop, which causes this. Maybe this is due to the use of the "Unity" framework, IDK.
1 person found this review helpful
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Teddy Sudol
March 15, 2025
Great selection of puzzles, good UI, good configuration options. Overall very fun! I'm taking away one star because the pre-written hints are frequently wrong and/or confusing. Hint #1 of Puzzle #22 "45s" is a great example: the third part (about where 8 goes in r1) directly conflicts with the previous part of the hint, and the final part is downright impossible. Of course, this isn't a problem if you never need hints, but some of us do!
3 people found this review helpful
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Elisabetta DG
August 7, 2023
I put 4 stars instead of 5 for one reason only: battery draining. I have bought all the apps and the sudokus are awesome. I spend a lot of idle time on them and they are totally worth it. Unfortunately, all the apps drain the battery a lot, so it is very inconvenient when you don't have a charger/power bank. There might be some looping or something running constantly in the background. I suggest to find a battery optimization strategy. A sudoku app should not drain that much battery :)
2 people found this review helpful
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