Sudoku Quest

This can be cheesed with a save scum if you're struggling.

The save files are stored at C:Users...\AppData\Roaming\HarbingerBeard\SudokuQuest\GameSaves

There will be two text files (if there's more than two, go with the two latest and delete any oldest if preferred). Copy those, back out of the folder, make a new folder, paste the copies as back ups in that new folder. Back ups can be made at any point as the file is updated in live time whilst in adventure.

Whenever you find yourself making too many mistakes on a puzzle, or run out of lives, back out to the game's main menu, copy the back ups, paste them in the proper folder, click adventure and you'll be back on the level with any progress made on the level since the last back up.

Make use of power ups if you are not going for the "I Don't Need Them"/"I Said, I Don't Need Them"/"I Mean It" achievements. Preferably the Red, Yellow and Pink fish for later levels--if only using Red it won't hinder your progress for "Thrifty"/"Miser" achievements too much. Don't bother with Green & Purple fish as they're a waste of coins. Only use Cyan fish as a last resort.

Achievements trigger when you start on the next level (2, 6, 11, 16, 21, & 26).