Sure, here's an implementation of a Tic Tac Toe game as a single HTML file using JavaScript and enclosed in script tags:
This implementation creates a Tic Tac Toe game with a 3x3 grid using div elements for each cell. Clicking on a cell triggers the `playerMove` function which updates the game board, checks for a win, and switches to the next player. The game continues until a player wins, at which point an alert is shown indicating the winner and the game is reset.