Sudoku Omega

You control everything with your mouse, clicking on an empty square to select it and then typing a number from your keyboard. The main goal is the classic one: fill the nine-by-nine grid so that each row, column, and three-by-three box contains every digit from one to nine. The game offered a few difficulty levels, which let you choose between puzzles with more or fewer starting numbers. The interface was simple, often with a timer running and maybe an option to pencil in tentative notes. The puzzles could be methodical and slow, or surprisingly tricky on the harder settings. It felt like a clean, focused way to work through a logic problem.