One of a kind
I have previously spoken about unique games, which were something new at the time - see my article "There can be only one". It was KeyForge by Fantasy Flight Games and designed by Richard Garfield of Magic: The Gathering fame, which started this new way of making games. There is probably a better and longer description of the term, but in short, the term unique in this context describes games where every published copy is different in a number of ways. In KeyForge this is, for example, the name and logo, as well as the composition of the different cards, but different decks will still have some cards the same. I want to look at some aspects of unique game design in more detail to explore the concept.