This game is a four in one game comprises of Tic Tac Toe and its friends: Make Fifteen, Gem Stones and Lighted Rooms. Tic Tac Toe - classic tic tac toe game, you and your opponent take turns to mark a grid of 3 x 3 squares, the one who marks a line horizontally, vertically and diagonally wins. Make Fifteen - you and your opponent take turns to pick up numbers from 1 to 9, the one who owns 3 numbers that add up to 15 wins. Gem Stones - you and your opponent take turns to pick up bags of gems, the one who owns all gems of the same kind wins. Lighted Rooms - you and your opponent take turns to light up candles in rooms, the one lights up all the candles in a room wins. You can play with your friend or with 3 different levels of computer players. The easy computer player is stupid, the normal one is reasonable, the hard one is unbeatable. Many people have reported that they have more understanding of the game of tic tac toe after registering this game. You can play the unregistered version for an unlimited time, but you cannot play with human players and advanced computer players in the three "friends" games. Full version of the game allows you to play with human players and advanced computer players in all the games. You will also receive tips on playing the "friends" games.