Many games have a clear objective which is to achieve maximum score by following game rules. This is de facto, but turns out some games become deadly difficult if you reverse the objective. Try playing a Reversi exactly opposite, i.e. take as little cells as possible.
My personal record was a game when I played black stones and every stone on the board was of white color.
You get extra bragging rights if the layout of the winner stones resembles a finger gesture :)