Sudoku Fever is a logic-based number-placement puzzle game for the Game Boy Advance, where the objective is to fill a 9x9 grid with digits so that each column, each row, and each of the nine 3x3 subgrids contain all of the digits from 1 to 9. The game presents an electronic version of the popular Sudoku puzzles often found in newspapers and puzzle books. While the exact release date varies, it was around the mid-2000s when Sudoku gained widespread popularity, making Sudoku Fever a timely addition to the GBA's library of games. Its genre would primarily be classified as puzzle or brain training.