| Unlockable: | How to Unlock: |
| Big Blue Message (50 points) | Find the glyph in Island Zone that tells you to find Big Blue. |
| Death Sonar (10 points) | Acquire the Death Sonar. |
| Ecco the Hero (10 points) | Rescue the dolphin family in The Lagoon level. |
| Game Win 2x (10 points) | Complete the game 2 times. |
| Game Win 3 (20 points) | Complete the game without dying more than 3 times. |
| Life Saver (10 points) | Reach Ridge Water without dying. |
| Octopus Avoider (15 points) | Pass the Undercaves without being hit by an Octopus. |
| Shark Killer (10 points) | Kill 10 Sharks in a row. |
| Sonar Free (35 points) | Reach the Dark Water Level without the Death Sonar. |
| Sonar User (10 points) | Kill 30 enemies with the Death Sonar. |
| Songs in the Sea (15 points) | Find the hidden glyph in Origin Beach ("Never have we heard..."). |
| Undercaves Survival (5 points) | Pass the Undercaves without dying once. |
