In the German language a game is any activity which is executed only for pleasure and without conscious purpose. In this definition every activity that brings pleasure is a game. For example, people dance, play musical instruments, act in plays, and play with dolls and model trains.
video games are an incredibly diverse medium. When we describe other media (literature, film, music, and so on), we can establish a few basic common assumptions about the experience of consuming those works; music is something we listen to, books are things we read, films are things we watch, and the difference between artists and genres within those media are defined by content (novels and short stories and graphic novels).
What is a game or what are games to you?