This paper is concerned with uncertainty of game outcome in Congkak and Othello. Firstly, an information dynamic model of uncertainty of game outcome is derived based on fluid mechanics. Secondly, data analyses of Congkak and Othello have been done. It is found that Congkak is a unique regional game in South-East Asia, while Othello is one of the most entertaining games in the globe. It is suggestedthat Shannon’s entropy provides a measure of uncertainty ofgame outcome, but not itself. The true uncertainty is given by the present proposed model.