Sure, here's a tic tac toe game implemented as a single HTML file using JavaScript:
Tic Tac Toe
This implementation creates a tic tac toe game with a simple user interface using div elements as cells. Clicking on a cell will make a move for the current player (X or O). The game will check for a win or a draw after each move. If a win or a draw occurs, an alert message will be shown and the game will be reset. The game supports multiple rounds by simply starting another game after a win or a draw.