Game does have a definition. They are unique from other media in the use of input and visual output. But "game" is a huge, ambiguous umbrella term that encompas

Game does have a definition. They are unique from other media in the use of input and visual output. But "game" is a huge, ambiguous umbrella term that encompasses a ton of experiences. It's a bit like "story" or "song" or "movie" - there's a lot of stuff that could accept those labels, and some of it is going to be real avant garde.