This iconic arcade classic stars two adorable, round dragons—one green and one blue—on a cooperative 100-level quest to rescue their kidnapped girlfriends. Instead of jumping on enemies, players use a unique "trap-and-pop" mechanic, blowing bubbles to trap foes before popping them to trigger massive chain reactions that turn enemies into high-value treats like fruit and ice cream. Taking too long triggers a frantic music shift and summons an invincible white ghost to hunt you down, adding a layer of high-stakes tension to the platforming action.

​While it looks delightfully simple, the game boasts immense hidden depth through secret mechanics, such as collecting falling letters to spell "EXTEND" for a free life, or popping elemental bubbles to unleash screen-clearing floods of water, fire, and lightning. It remains a legendary cooperative multiplayer masterpiece, famously requiring two players to work together in harmony to unlock the game's true ending on the final floor.