Trilite 3.0 - Popular Pick

Trilite is a game similiar to tic-tac-toe, but much more fun and
challenging. The object is to get three adjacent squares set to your color.
These squares may be horizontal, vertical, or diagonal. On your turn, click on
any empty square to fill it with your color. Sound simple enough? Well, here's
the trick: you may only have three squares at a time. Once you click on a
fourth square, the first one you selected becomes empty again, allowing your opponent to make a surprise move. You may play against another person or a computer player (with two levels of difficulty).