This 1993 port of Rainbow Islands for the Sega Master System/Mark III is an arcade-style platform adventure where you rescue islanders cursed by the Boss of Shadow. Gameplay centers on traversing sinking islands by utilizing your unique ability to generate solid rainbows, which act as both temporary platforms and weapons. The core loop involves collecting gems and mirrors across ten islands to confront the final boss. Note that this specific European/Australian port contains a known bug that prevents viewing the ending after Level 7.
The atmosphere of the game centers around vibrant, sinking islands. A critical element of the challenge is the environment itself, as each level is progressively submerging into the sea. Success requires players to reach the top of the stage before time or water overtakes them.
The most distinctive feature of the gameplay revolves around the player's unique ability to generate solid rainbows. These rainbows serve a dual purpose: they function as essential temporary platforms, allowing traversal across gaps and up vertical spaces, and they are also utilized as the primary offensive weapon against enemies.
The overarching goal is a rescue mission. Bubby and Bobby embark on a journey across the ten Rainbow Islands. To achieve their goal of reversing the curse placed upon the islanders by the Boss of Shadow, players must systematically locate and gather the required large gems and mirrors scattered throughout these island stages.
As a port, this version brings the established gameplay loop to the Sega Master System/Mark III hardware. Ports often present unique interpretations of the original arcade experience, adapting controls and visuals to the capabilities of the target system.
It is important to note that this specific European/Australian Master System port contains a known technical limitation: a bug that causes the game to crash back to the title screen after completing Level 7. If players utilize a level select code to access Level 8, the same glitch occurs upon completion of that stage, preventing access to the game's conclusion. The Brazilian version of this port reportedly contains a fix for this specific issue.
The core mechanic relies entirely on the creation and use of solid rainbows for both movement and combat. Mastering the timing and placement of these ephemeral structures is central to progressing through the vertically oriented stages before the island sinks.
Regarding extra content, this specific release does not feature any downloadable content (DLC), expansions, remakes, or remasters beyond this initial port release.