Complete the game 2 times.
Reach the Dark Water Level without the Death Sonar.
Complete the game without dying more than 3 times.
Find the hidden glyph in Origin Beach ("Never have we heard...").
Find the glyph in Island Zone that tells you to find Big Blue.
Reach Ridge Water without dying.
Rescue the dolphin family in The Lagoon level.
Kill 30 enemies with the Death Sonar.
Kill 10 Sharks in a row.
Acquire the Death Sonar.
Pass the Undercaves without being hit by an Octopus.
Pass the Undercaves without dying once.
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