Batman: Arkham - 10 Secrets & Events You Definitely Missed

10. Starro's Cameo - Batman: Arkham Knight

Starro the Conqueror might be better known for his tussles with Superman across the DC universe, however, he still manages to find a way into the Batman franchise via a hidden cameo in Batman: Arkham Knight's Batgirl: A Matter of Family DLC.

Players can find Starro at the Seagate Amusement Park in a hidden room between the Great White and the Ferris wheel. It's not an easy location to find, unmarked on the map and only being accessible through a single grate. The DC villain is being housed in captivity, stuck in an unbreakable tank with players only seeing the outline of the alien creature against the glass.

Nevertheless, there are still advertisements dotted around the room explaining to any visitors the identity of this strange exhibit and even referencing their fabled mind-controlling powers.