Gridlock is a pattern building game for 2 to 4 players. All the action takes place on a 7x7 square wooden board. Every turn you have to choose a wooden 2x2 square tile and place it on the board. These squares consist of randomly areas in the colors red, yellow, green and black. Whenever you place a tile, you check whether you have created a larger area of any color and count the points. Tiles may only be placed directly on the board or stacked if the top tile lies on at least 2 different tiles without falling off. The game ends if there are no tiles left or no places to build anymore. The player with the most points wins. —user summary