Philosophy attempts, not to discover new truths about the world, but to gain a clear view of what we already know and believe about it. That depends upon attaining a more explicit grasp of the structure of our thoughts; and that in turn on discovering how to give a systematic account of the working of language, the medium in which we express our thoughts.
A game may be as integral to a culture, as true an object of human aesthetic appreciation, as admirable a product of creativity as a folk art or a style of music; and, as such, it is quite as worthy of study.