As a kid, Edward Nigma was fascinated with word-games, puzzles, and riddles to the point where he became obsessed with them. He would then use this obsession to test his wits against the law and after much success tricking the average man/woman, he turned to crime as the Riddler. He set his sights on Batman, believing that he would be a worthy adversary, and leaves behind a clue at the scene which Batman always manages to solve before apprehending him. Unlike the other Batman rogues, the Riddler commits crimes behind mind games and it takes Batman's intellect to solve them rather than physical force. The Riddler has a genius intellect in constructing riddles and is usually armed with his "?" cane that contains weapons and computer technology.