Sentence:  "Joshua:" Shall we play a <WSD>game</WSD>?/ "David:" ... Love to. How about Global Thermonuclear War?/ "Joshua:" Wouldn't you prefer a good <WSD>game</WSD> of chess?/ "David:" Later. Let's play Global Thermonuclear War./ "Joshua:" Fine. 
Meaning of the word marked with <WSD> tags:  An activity described by a set of rules, especially for the purpose of entertainment, often competitive or having an explicit goal.