Invincibility:
Hold A + Start when the name of the level appears. Release the buttons and press Start when the level is ready for game play.

No background music:
Pause game play and press A(5).

Cheat mode:
Turn Ecco to the left or right. Pause game play when Ecco is facing the screen. Press Right, B, C, B, C, Down, C, Up. A cheat menu with stage number, sound select, music tempo, message number, unlimited life, teleporter coordinate options will appear.

Level select:
Enter PLEASE__ as a password, where "__" represents one of the following two letter entries.

Level	Suffix
Ice Zone	EE
Island Zone	FF
Pteranadon Pond	GG
City of Forever	HH
Under Caves	II
Deep City	KK
Last Fight	OO
Origin Beach	QQ
Marble Sea	UU
Open Ocean	WW
Ridge Water	ZZ

Level	Normal password	Unlimited air
The Undercaves	AAAAAAAA	LEVELSCT
The Vents	AANNAANN
The Lagoon	NDRBRIKR	SHARKFIN
Ridge Water	HYAUGFLV
Open Ocean	FNCQWBMT	KHDBVRIS
Ice Zone	DWFFZBMV	XRGQXRIX
Hard Water	ANANANAN	MAGLXRLM
Cold Water	MCLFRQLW	LNXHXRLB
Jurassic Beach	MDEBRCBO
Pteranodon Pond	JNXFRCBS
Origin Beach	AAAANNNN
Island Zone	NNNNAAAA	DVJLURIC
Deep Water	EILQOQLC	OEWSURLC
The Marble Sea	XAKUQQLS
The Library	FDGXQQLC
Deep City	AANNNNAA
City of Forever	DETSWCIY
Trilobite Circle	DETSWCIY
Dark Water	NNAANNAA
Deep Water 2	EQAAKNLC
City of Forever 2	ZBPIGPLD	FIVEPODS
The Tube	KUVEKMLK
The Machine	NNNNNNNN	ECCOFMLY
The Last Fight	KNLMLMLC

Note: Enter LIFEFISH as a password to begin a new game with unlimited air.

Killer sonar:
Enter a level password with unlimited air. Press A + B during game play to kill all enemies on sonar.

Unlimited lives:
Enter NIHPLODS as a password.

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