Ecco the Dolphin Defender of the Future

The story takes place in the year 2151, where Ecco must navigate through various underwater levels, avoiding deadly sea creatures and hostile aliens. Along the way, he meets new allies who aid him in his mission to stop the evil forces threatening his world.

The gameplay involves controlling Ecco as he swims through the ocean, fighting enemies, solving puzzles, and collecting power-ups. Players can also use special abilities, such as Ecco's echolocation, to overcome obstacles and defeat foes.