Riddle of the Minotaur was conceived and created by Nygma and most likely served as Competitron's big break in the gaming industry. However, Nygma's employer, Daniel Mockridge, did not look to ethics as Nygma did. Having tricked Nygma years ago into signing a Work-For-Hire contract, Mockridge became the sole copyright owner to the game, leaving Nygma, ironically the game's creator, with nothing. Nygma tried to sue Mockridge for a share of the profits, but since he had no legal claim to the game's rights, he lost the case and was fired.
After this, the game became a huge success, bought by millions of fans, among them Dick Grayson, who would occasionally play it on the Batcomputer. Outside of the city, a life-sized version of the game was built in an amusement park, and was notorious for its high level of difficulty to win. However, the game would come back to haunt Mockridge in two years' time, as his own lust for money eventually drove the company into severe financial ruin and bankruptcy, as well as a vengeful Nygma hunting him down in revenge for cheating him. In a twist of irony, Nygma captured Mockridge and took him to the centre of the life-sized maze, where he programmed the robotic Minotaur to kill him at 4:30 AM, additionally rigging the maze's accessories to make them life-threatening. Batman and Robin eventually saved Mockridge, though the Riddler temporarily fled the city.