The Arkham games are pretty well known for including lots of cool hidden easter eggs (who can forget Calendar Man’s date-specific dialogue from Arkham City?). Naturally, Arkham Knight also has some secrets that can only be accessed on particular dates, as one intrepid PC player has discovered.
If you turn your system clock ahead to October 31st and go to the Gotham City Police Department, Batman will fittingly encounter a Halloween-themed surprise. Considering the game takes place on Halloween night, it only makes sense that there would be some clever secrets pertaining to the spooky holiday. Still, kudos to Rocksteady for including an easter egg that actually took almost a month to be discovered. It will be interesting to see if players uncover anything else.