What is "a game"

Usage examples of "a game".

Then he had a game of centrifugal squash with a cultural deputy from the Department of Extrasystem Concerns.

Concocting plausible but unsubstantiated reasons why any historical figure that somebody disliked or disagreed with had been a Jevlenese agent had become something of a game in the popular media.

Dougless was dressed, Honoria led her to the Presence Chamber, where Lady Margaret and her oldest son were playing a game of chess.