IGN

Riddler Collectibles and Challenges

In Suicide Squad: Kill the Justice League, the Riddler will challenge the squad to a battle of wits. This takes the form of Riddles, AR Challenges, and Trophies scattered across Metropolis. This ...
Comicbook.com

Back Issues: The Riddler’s Most Puzzling Plots Solved by Batman

In Detective Comics #140, co-creators Bill Finger and Dick Sprang introduce the Riddler as a puzzle expert out to baffle Batman with a series of perplexing plots. Challenging the dynamic duo to a ...