“Batman: Arkham Knight,” like every game in the “Arkham” series, is packed to the gills with Easter eggs and sly references to other characters and events in Batman’s world. They’re probably one of the best aspects of the series.
However, where “Arkham Knight” differs from the rest is in the substance of all these nods and references. While previous games focused pretty squarely on the wider Batman mythos, “Knight” doubles down on the world outside of Batman, making lots of references to other DC Superheroes and a few other supervillains.
Of course, this isn’t a comprehensive list — development studio Rocksteady Games once famously hid a secret so well in “Arkham Asylum” that they had to rat themselves out years later — but it gives a good feel about how other heroes might fit into the world of the “Arkham” games.
Some light spoilers ahead.
'The Ghost in Grey' posters scattered around Gotham reference the 'Batman: The Animated Series' episode 'Beware The Grey Ghost,' in which it was revealed Bruce Wayne was inspired to become Batman by the fictional Grey Ghost (voiced by '60s Batman Adam West). Years later, the actor who portrayed Grey Ghost returns to the spotlight to team up with Batman and stop the Mad Bomber (voiced by 'Batman: TAS' creator Bruce Timm).
It's pretty meta.
Clayface is a pretty important character in the 'Arkham' games, with a fun cameo in 'Arkham Asylum' before taking on a bigger role in 'Arkham City.'
This poster is before all that, though, when he was just a horror movie actor in the classic film 'The Terror.' His path to villainy would begin when his studio would decide to remake 'The Terror' -- without him.
If you watch 'Arrow' or 'The Flash' on the CW, chances are you might know about the DC superhero Black Canary -- she doesn't appear in 'Arkham Knight,' but this club is named after her -- and it's apparently frequented by the poker-card themed villains of the Royal Flush Gang.
Oswald Cobblepot, AKA The Penguin, runs a refrigeration company called North Refrigeration. The Penguin is voiced by voice acting extraordinaire Nolan North -- who is now a part of the DC Universe.
An old DC Superteam with a paranoid twist, 'Secret Six' is a bit of a cult classic, especially under writer Gail Simone's tenure from the mid-2000s to the present.
In 'Arkham Knight,' there is a pretty glam-looking storefront named Secret 6. While not quite evocative of the actual Secret Six, it is a fun reference for those who love DC lore.
A DC villain that got reimagined and prominently featured in 'Arkham Origins' is still kicking about all these years later. While she's nowhere to be found in 'Arkham Knight,' you can find a lab where someone's trying to recreate her poison.
You'll find a few travel ads scattered throughout 'Arkham Knight,' with the most recognisable destination being Metropolis -- Superman's hometown.
Even though they have a bigger role in this game, most of their backstory is kicked off to the character bios you can read in your spare time.
This particular poster refers to Nightwing's past. Before he left Batman's side to fly solo in another city as Nightwing, Dick Grayson was the first Robin, a former acrobat of The Flying Graysons that joined Batman as a boy after his parents were killed by criminals extorting their circus.
Spotted in the diner of the very beginning of the game is a newspaper with a familiar corporation name.
Queen Industries is run by none other than Oliver Queen, the Green Arrow.
Turns out there are a bunch of DC superheroes that run megacorporations. Funny how that works.
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