ACHIEVEMENT - HOW TO UNLOCK Undercaves Survival (5 points) - Pass the Undercaves without dying. Death Sonar (10 points) - Get the Death Sonar. Ecco the Hero (10 points) - Rescue the dolphin family in The Lagoon level. Game Win 2x (10 points) - Beat the game 2 times. Life Saver (10 points) - Reach Ridge Water without dying. Shark Killer (10 points) - Kill 10 Sharks in a row. Sonar User (10 points) - Kill 30 enemies with the Death Sonar. Octopus Avoider (15 points) - Pass the Undercaves without being hit by an Octopus. Songs in the Sea (15 points) - Find the hidden glyph in Origin Beach. Game Win 3 (20 points) - Beat the game without dying more than 3 times. Sonar Free (35 points) - Reach the Dark Water Level without the Death Sonar. Big Blue Message (50 points) - Find the glyph in Island Zone that tells you to find Big Blue.