Game of Thrones (season 7) involves new dragons.
" (Elliot Avedon and Brian Sutton-Smith)"to play a game is to engage in activity directed toward bringing about a specific state of affairs, using only means permitted by specific rules, where the means permitted by the rules are more limited in scope than they would be in the absence of the rules, and where the sole reason for accepting such limitation is to make possible such activity
 However, single-player games are unique in respect to the type of challenges a player faces

