The Bubble Bobble series is a long-running game series which has amassed over 30 games and two spin-offs. The series has been published by the Taito Corporation, and later by their parent company, Square Enix. The Bubble Bobble series is one of the most ported series ever, with the original appearing on over 19 different platforms, and the sequel, Rainbow Islands, appearing on 17 different ones. While the first game, Chack'n Pop, was originally a stand-alone game, it has been retroactively absorbed into the Bubble Bobble series. The series proper started with Bubble Bobble.