The Master of Games is a being from an alternate dimension and an enemy of the Teen Titans. The origin of the Master of Games remains unknown. At some point he acquired his mystical amulet and, having observed the capabilities of Earth's superheroes, decided to gain their powers for his own. For this purpose, he created a special combat arena, abducted eight "heroes" from Earth - Robin, Cyborg, and Beast Boy from the Teen Titans, independents Aqualad, Speedy, Hot Spot, and Wildebeest, and Gizmo of H.I.V.E. Academy - and subjected them to a one-on-one contest with each other for the promise of winning "great prizes". However, Cyborg and Robin eventually found out the true purpose of the "games". Robin, as the last remaining contestant, challenged the Master of Games to a last duel in which he freed all the captured contestants from the medallion, defeating the Master. However, right after all the "heroes" returned to Earth, the Master of Games immediately set up a new contest, this time with eight "heroines", which included Starfire, Raven, and Terra; but just as before, all of them are presumed to have prevailed. The Master of Games later joined the Brotherhood of Evil, but he didn't participate in capturing independent Titans like most of the Brotherhood did. Later, when Beast Boy led Pantha, Herald, Mas, and Jericho in an assault at the Brotherhood base, Pantha punched the Master of Games and sent him flying. Ultimately, he was defeated when his fellow villain XL Terrestrial was blasted to the floor by Starfire and Raven. The giant alien fell down and, again, sending the Master flying.