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is an arcade game by Taito, first released in 1986 and later ported to numerous home computers and game consoles. The game, starring the twin Bubble Dragons and , is an action-platform game in which players travel through one hundred different stages, blowing and bursting bubbles, avoiding enemies and collecting a variety of items. The game became very popular and led to a long series of sequels and spin-offs. The main goal of the game is to rescue Bub and Bob's girlfriends from monsters. It is also notable for being an early example of a game with multiple endings, which depended on...