Sudoku Quest

Relaxing game. I recommend this game for people who like puzzles.
This game makes you use your math skills and as you play you will notice it is teaching you to use basic Algebra.
The game becomes more difficult gradually until you come to a point where you notice you are actually challenged to solve the puzzle.
I like this game, it’s nice, simple and rules are clear.
Sounds are fine, but I am prefer listening my music or something from YouTube.
Do not expect this game for story, just enjoy Sudoku puzzle.
For the price, this is definitely worth getting.

Portable Description
Sudoku Quest brings the classic paper puzzle game to a virtual platform. Comprised of multiple board types and power-ups, along with a customizable Sudoku generator, SQ will provide much of what is desired in a PC adaptation for puzzle fans.
Gameplay
Board Types
There are three different board types that SQ uses throughout gameplay. A description of each is provided below, including their respective rules.
Classic Sudoku - fill the entire grid with numbers from 1-9 so that no numbers repeat themselves in any of the 9 rows, columns, or 3x3 houses.
Overlapped Classics - portions of a classic board are overlapped with additional boards.
Nonomino Sudoku - 3x3 houses are replaced with colored irregular blocks.
Gold & Lives
In adventure mode, the player starts with 10 hearts (life). Each time a player incorrectly inputs a number in a cell (excluding pencil notes), one life will be lost. There is also no method of replenishing hearts/life in a playthrough. Once all hearts are gone, the adventure is over.
Gold is the currency system in Quest, and it is randomly awarded from correctly inputting numbers into cells. Gold is used to purchase/activate power-ups (described below).
Power-ups
The power-up system is a unique mechanic in Sudoku Quest that introduces a little bit of freshness when the gameplay gets stale. It also makes Sudoku solving very friendly to newcomers. The list of available power-ups are provided below (all are unlocked from the beginning).
Reveal Cell.
Remaining Values: how many unrevealed cells contain a specific value.
Shield.
Possible Values: choose a cell and pencil in all possible values.
Shuffle: shuffle revealed/unrevealed cells.
Highlight: highlight whole row & column of hovered cell.
Adventure Mode
The goal of adventure mode is to reveal specifically marked cells - the player is not required to reveal an entire board to progress. The player can either continue to the next board upon completing it, or stay on the same board to finish revealing all cells (and earn gold). The board types vary each level, and the difficulty begins to increase as the starting number of givens is slowly diminished in each subsequent level.
Custom Games
An infinite Sudoku generator is provided so that the fun never ends! The player is able to configure the: board type, number of givens, starting life, and starting gold.
Conclusion
Advised Suggestions
There are a few suggestions that may improve gameplay listed below.
Improve aesthetics/add themes.
Implement personalization options.
Provide a description of a power-up's ability upon mouseover.
Verdict
Sudoku Quest is a casual Sudoku generator with a twist. Unfortunately, the aesthetics, music and absence of personalization options (background color, board themes, etc.) leave a desire for more; however, the lack of Sudoku games on Steam makes it hard to regret purchasing SQ. The game’s customizability, power-up system, and ability to cater to new and old Sudoku solvers earn it a recommendation for any fan of puzzle or logic games.
Before You Buy – analyses of newly released indie games

Theres really nothing much to write about this game. It is simply Sudoku with customization and a bit of extra game modes (not that I really played any of those).
If you like classic Sudoku, you will like this for the most part unless you don't like thier user interface. Instead of buying a Sodoku book, you can buy this and get all the Sudoku puzzles you want forever without a need to worry abotu erasing. The only thing is that Sudoku Quest tells you if you are wrong right away so unlike Sudoku books, you won't find out with like 6 boxed remaining that you fucked up somewhere.
Like I said before, if you like Sudoku, you will like this. With that in mind, I will give a tentative recommend for this game because it really is targeted at such a niche audience.
Rating: 7.0/10
Recommend Price: $3.00 or under

Not bad game.
Regular Sudoku with the addition of reinforcements(you can read about them "How to Play").
+ cards
+ achivements(but you can't beat 100% without SAM or pause hacking)
- no music. If you don't have own - give opportunity to play my own(place it into game directory and after starting new map it changes)
Totally: if you have extra money, like Sudoku, then buy this game - treat yourself and developers

Gotten a steam key from a friend.
I like Sudoku, did it a lot in high school and few years after. It was fun, kept me thinking. If you love Sudoku's, get this.
This game is good, offers two concepts I never new were a thing: Nonomino and Overlapped.
Nonomino is pretty much tetris-style of filling in numbers (with slightly different rules), while overlapped is 2 or more sudoku's combined into one, but still follows the same rules.
There's powerups to help you in adventure or custom. There are minimum mistakes you can make, and the game will let you know you tried to put in the wrong number.
My only issue with the game is the sound, it sometimes breaks causing white/static noise for a split second out of nowhere that I have to turn the sound off to avoid any damage to my ears.
The base price is good, but maybe wait for it to be a bit lower.
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Sudoku Quest seems to be "merely adequate" in almost every way.
However, the "Adventure" is a nice idea, where you "win" by not necessarily revealing the whole puzzle but just particular squares identified with a Green X on them. And after winning you can "continue" to the next puzzle on the same difficulty level getting more gold (used for buying 'clues' such as revealing or eliminating numbers/etc), or you can advance to the next harder difficulty level.
It's also nice that the game has achievements and a couple variations on the classic Sudoku puzzles, such as the nonomino (where instead of 3x3 blocks, they are colored "tetris-shaped" blocks), and also Stacked Classic sudoku puzzles where multiple Sudoku puzzles overlap.
Unfortunately, the game has some problems..
- What little sounds there are, occasionally glitched for me. Enough so I turned the audio off.
- Also, the Adventure is somewhat buggy as I completed everything that was even visible on the screen and it still didn't register a "win" so I could proceed to the next level. So, that was the end of that series of games. Either a Green X was OFF the screen, or it's just bugged.
Overall: It's playable but it leaves me thinking, there's got to be better out there. 7 out of 10.

This is a nice version of Sudoku, with interesting variations.
What I like: Positives are a range of achievements to that give an additional goal to game-play, some useful power-ups that let you play the way you want to, a nice look and feel to the artwork and an easy to use interface on PC. I particularly like the variation with coloured blocks overlayed across the grids, so you need to take an extra set of boundaries into account. On the most part, its enjoyable to play.
What I dont like: The more advanced levels have overlapping grids. These are too large to be displayed on the screen at once, and you need to click & drag the screen to see the grids. I also find these grids hard to complete without the power-up that pencils in the possible options. It's a bit hard to describe. Instead of a traditional grid of 3 x 3 boxes, these give the player two 'overlapping; puzzles that share some grids where the puzzles overlap, so you may have a grid of say 5 boxes x 3 boxes through the middle. Logically, each block of 3 boxes should have numbers 1 to 9 in them. Yet in Sudoku Quest, you can have the same number appear twice in a block of 3 - depending on where the game is drawing the boundary of each of the overlapping puzzles. Baffling! I find it irritating to fail the game when it's unclear that in one set of rows, the numbers are independent from the ones in the next box, yet in another game, they are not.
There are other minor issues, already mentioned in reviews. The sound is not great, and the power-ups are not explained on screen so you keep having to refer back to the user guide to remember what they do until you've played a bit.
Final verdict: A nice version of Sudoku, and for the price I'm willing to forgive a few irritations.