Atlas first appeared after Cyborg defeated him in a video game. Then he burst out of the video game screen and declared a rematch with Cyborg. After Atlas defeated Cyborg, he kidnapped the other Teen Titans, along with his minion, Spike. Later on, Cyborg came to the rescue and once again battled Atlas, and defeated him once and for all.
Atlas later returned as a minion of the Brotherhood Of Evil headquarters. He was sent along with Adonis to fight and capture Pantha, but was defeated by her. He later returned in the final battle. He got one of his legs severed by Bushido and was not flash-frozen along with the other villains.