The biggest and best Sudoku game ever! Play now for FREE!

We've created a GIANT grid of over 350 hand-crafted Sudoku puzzles to challenge players of all ages! Can you complete the whole grid, beat the Quests, and collect all of the Trophies?

To fully master the game you must complete all these challenges:

● Play on Easy, Medium, Hard and Super-Hard grids
● Complete each of the 361 individual sections
● Collect all 45 of the prestigious trophies
● Complete all 57 quests
● Unlock all 10 achievements

World’s Biggest Sudoku comes complete with these helpful features:

● Use Pencil Marks to help with your deductions
● Useful Hint features to help if you get stuck
● Choose from several background themes to suit your style

Take the challenge now!


Please select the HELP option from the Options menu (the gear icon in the top right corner of the game screen) if you require assistance.

Alternatively you can contact us by email:

World's Biggest Crossword is free to play, but contains optional paid items to unlock puzzles more quickly.

Facebook: /BigPuzzles - Twitter: @BigPuzzles


● One Clue Crossword
● World's Biggest Picture Cross
● World's Biggest Mahjong
● World's Biggest Crossword
● World's Biggest Wordsearch
● World's Biggest Jigsaw

What’s New

Version 1.3

- Improved graphics
- A new in-game Help system
- More ways to earn Tokens and Coins

If you like our game, please take a moment to leave us a user review! Reviews help us bring you more great games. Thank you!

Ratings and Reviews

4.5 out of 5
3K Ratings

3K Ratings

Kingstown ,

Decent time killer

Amount of ads is ridiculous. Good amount of coins and tokens rewards. I wish the tokens accumulated past 10 when you're not active, because some of the quests require the use of tokens, I usually skip those by forfeiting 2000 coins, since coins accumulate fairly quickly. Easy games are great when you have only a couple minutes and the harder puzzles aren't impossible, but they do require a little more time and logical thinking. --Update: just finished the last puzzle and now I'm bummed, there's no levels! 😩 I have to agree with another reviewer, the layout is a terrible strain on the eyes. And it would be nice if there was some sort of indication on how many tokens are needed for each board so you don't have to search the entire grid to find a game that's within your token budget. Despite those two things, I hope there's an update soon with more levels! Thank you! 😊

Magsjvh ,

One change?

Great game. Wish they would allow players to exchange coins for tokens. Coins are easy to accumulate. You can skip games with coins, but that’s not as enjoyable as playing the game. You can get more tokens by going to the "get more free", but that involves a lot of watching game ads. The other fairly simple involves a quiz, BUT you must then post that to Facebook. Not my thing nor is buying tokens. I agree with another reviewer that eventually many users will more on to other games.

Azchica08 ,

Great Sudoku!

I like the look and ease of use of this Sudoku game! They really have done a great job with the note-taking option, I would say the best out of all the Sudoku apps I've used. I also really enjoy that they've added some extra fun to the game with quests and trophies. It does add an extra element of excitement. The only thing I don't love is that you don't start out with very many free puzzles, and you have to use tokens to buy puzzles. I haven't ran out of tokens yet, but I imagine I might at some point because I will run out of cheap puzzles. (I'm going through the ones that cost 7-12 tokens, but there are some that cost 20-40 tokens!!) At that point, I may get tired of this app because I am not spending money to buy tokens.


AppyNation Ltd
128.5 MB

Requires iOS 7.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, French, German, Italian, Portuguese, Russian, Spanish

Age Rating
Rated 4+
© Supersonic Software Ltd.
In-App Purchases
  1. Tokens Booster Pack $2.99
  2. Tokens Mega Pack $9.99
  3. Tokens Super Pack $4.99


  • Game Center

    Challenge friends and check leaderboards and achievements.

  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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