Get four in a row horizontally, vertically or diagonally on one plain or across all four plains. Played against the computer. (Java)

Four dimensional version of the game offering five difficulty levels. Played against the computer. (Java)

Two player version of Tic Tac Toe game played with pigs. Game requires Internet Explorer 4.0 or higher. (JavaScript)

A game that never wins.

Game played against a smart-mouthed virtual chihuahua. (Flash)

Game allows user to specify the height and width of the board, and the number of marks in a row needed to win. Played against the computer. (CGI)

Provides three levels of difficulty and free source code. Played against the computer. (CGI)

Game offers two-player, play against computer, or computer vs computer option. Features three levels of difficulty and saved wins. (JavaScript)