21st May 1974: From left to right, John Cleese, Neil Innes, Michael Palin and Eric Idle dressed as Arthurian knights on the set of 'Monty Python and the Holy Grail'. (Photo by John ...

Every time I think I’ve seen Magic: The Gathering’s most unexpected crossover yet – be that Hatsune Miku or the board game Clue – Wizards of the Coast figures out some way to surprise me yet again.

As tabletop role-playing games explode in popularity, indie publishers are pushing industry boundaries both behind the scenes and in game design, including the kind of material that gets adapted — ...