TIX.TAX is 3x3 regular tic tac toe fields. Each move controls which tiny game unlocks.
TIX.TAX is an advanced version of Tic Tac Toe, the exception is that there are nine games.
When you win three games in a row, you win the entire game.
But that is a lot more difficult than it seems, because the move you make controls which game becomes clickable for the opponent.
Because of this, TIX.TAX is a lot more challenging than Tic Tac Toe.
You have to think a lot further ahead if you want to win.