It is a two player offline mode desgined for those who want to play on same device. It is simulation of Pen & Paper version of Tic-Tac-Toe.
Play against Computer :
It is a single player offline mode. In this mode a player can play against computer in 3 difficulties level.
Online Game :
This is an online mode in which you can play with random person playing at same time.
Host Game :
This online mode creates a personal room with a code to play with friends. You can share your code with others and they can play with you using that code.
Join Game :
This online mode provides option to join into someone else's room to play with him. Only 2 person can be there in a room at a time.