From the Winter/Spring 1983 Activision catalog: Designed by Matthew Hubbard, Dolphin is ready to ride the wave. Make way for the first game to use sound effects to let you know of off-screen hazards and escape routes that are looming ahead. You're being chased by a hungry sea monster. As the sun moves across the horizon, you must make your way through schools of sea horses and try to catch the power of the magic seagull. Being chased by a sea monster has never been this exciting before.