Based on the classic arcade sequel to Bubble Bobble, Rainbow Islands: Evolution finds Bub and Bob battling an evil, ecosystem-destroying record company. Players must battle the corporation and its seven malevolent bosses across ten sinking islands. The goal on each level is to reach the top of the screen, and to do so players must make use of the duo's ability to produce solid rainbows that act both as a weapon and as a means to navigate each 3D landscape. Gamers can try the classic platforming adventure alone, or join up to three friends in the multiplayer mode.