User Summary EcoQuest: The Search for Cetus is an educational point-and-click graphical adventure game developed using Sierra's SCI engine. It was developed by Sierra, and is the first game in their EcoQuest series. The game follows the exploits of 10-year-old Adam Greene, accompanied by a talking dolphin named Delphineus, as they search for Cetus, the whale king of the underwater kingdom of Eluria.