"Implementing Tic Tac Toe with 2MB of HTML - no JS or CSS"
So some internet person made tic-tac-toe in pure HTML, totaling 170MB.
And I was like "hold your horses, this method has incredible redundancy when storing board states." So I made tic-tac-toe in pure HTML, totaling 2MB. Here's a python script which generates 2MB HTML tic-tac-toe. The script iterates over the possible board states, only writing the states that can be achieved through normal gameplay: where the number of Xs is equal to or one greater than the number of Os, where it is possible the previous turn had no three-in-a-row, and where the winner, if any, was the player with the most recent turn.