"Dive In" is game for one player and is intended to be played against computer opponent. As a pearl hunter you have to dive into the depth of sea to find and collect pearls. You are equipped only with an oxygen tank and harpoon with an infinite number of shots. The game objective is to pass 20 levels and collect as many pearls as you can. The game becomes more and more challenging with each progressive level. Each level contains different adventures and various types of enemies.