Ecco The Dolphin cheats and cheat codes for Xbox 360

Achievements:
Complete the following achievements to award the indicated amount 
of Xbox Live Gamerscore points. 

Undercaves Survival (5 gamerscore points): 
Pass the Undercaves without losing a life.

Songs in the Sea (15 gamerscore points): 
Find the hidden glyph in Origin Beach ("Never have we heard..."). 

Sonar User (10 gamerscore points): 
Defeat 30 enemies by using the Death Sonar. 

Sonar Free (35 gamerscore points): 
Reach the Dark Water Level without using the Death Sonar. 

Shark Killer (10 gamerscore points): 
Kill ten Sharks in a row. 

Octopus Avoider (15 gamerscore points): 
Go through the Undercaves without getting any damage from Octopus.

Life Saver (10 gamerscore points): 
Reach Ridge Water without losing a live.

Game Win 3 (20 gamerscore points): 
Finish the game, but do not lose live more than 3 times.

Game Win 2x (10 gamerscore points): 
Finish the entire game two times. 

Ecco the Hero (10 gamerscore points): 
Save the dolphin family in The Lagoon level. 

Death Sonar (10 gamerscore points): 
Awarded when obtained the Death Sonar. 

Big Blue Message (50 gamerscore points): 
Find the glyph in Island Zone that tells you to find Big Blue.