Riddler Trophy, Arkham Wiki

The Riddler Trophies are small '?' shaped contraptions that are scattered throughout Arkham Island, Arkham City, and Gotham City by the Riddler for Batman and Catwoman to find and retrieve. They are small, mechanical boxes made up of gears and tiny generators that presumably power the neon green question mark-shaped light bars that project out of the box. After Batman retrieves all of the Enigma Datapacks, he finds a secret room with a prototype Riddler Trophy. Which presumably showed that Batma

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