4 in a line is a classic puzzle game where you need to place 4 pieces in a row, either vertically, horizontally, or diagonally, before your opponent does. The players first choose a color and then take turns dropping their colored discs from the top. The pieces fall straight down and the first player that takes four discs in a row wins the game.
The aim of Sudoku Companion is to make solving Sudoku puzzles more convenient.
