Ecco The Dolphin

Ecco the Dolphin (title screen: Ecco) is an action-adventure game originally developed by Novotrade International for the Mega Drive, and published by Sega in 1992. The game's designer is Ed Annunziata. It is the first installment in the Ecco the Dolphin video game franchise. The player character, Ecco, is a bottlenose dolphin who travels through time to combat hostile extraterrestrials in Earth's oceans and on an alien spacecraft.