Ecco The Dolphin — Cheat codes

Options

While playing, move Ecco ⬅️ and ➡️ and pause the game with Ecco facing you. Next, press ➡️, Ⓑ, Ⓒ, Ⓑ, Ⓒ, ⬇️, Ⓒ, ⬆️. Ⓐ menu will appear, offering you several options including level select, sound test, and invincibility.

Music Off

To turn off the background music, pause the game and press Ⓐ five times.

Invincibility

When the level name appears, hold Ⓐ + Start until the level begins. When the game screen appears, unpause and you've got invincibility!

Passwords

Swim to victory with these passwords.


The Undercaves AAAAAAAA

Deep Water EILQOQLC
The Vents AANNAANN

The Marble Sea XAKUQQLS
The Lagoon NDRBRIKR

The Library FDGXQQLC
Ridge Water HYAUGFLV

Deep City AANNNNAA
Open Ocean FNCQWBMT

City of Forever DETSWCIY
Ice Zone DWFFZBMV

Trilobite Circle DETSWCIY
Hard Water ANANANAN

Dark Water NNAANNAA
Cold Water MCLFRQLW

Deep Water 2 EQAAKNLC
Jurassic Beach MDEBRCBO

City of Forever 2 ZBPIGPLD
Pteranodon Pond JNXFRCBS

The Tube KUVEKMLK
Origin Beach AAAANNNN

The Machine NNNNNNNN
Island Zone NNNNAAAA

The Last Fight KNLMLMLC

Super Sonar

For lethal sonar, enter any Unlimited Air code, then press Ⓐ + Ⓑ while playing. Your sonar will look the same, but will kill all enemies it detects.

Unlimited Air

Here are some passwords for unlimited air. For unlimited air in a new game, enter "LIFEFISH" as your password.
Level Passwords 

The Undercaves LEVELSCT

Cold Water LNXHXRLB
The Lagoon SHARKFIN

Island Zone DVJLURIC
Open Ocean KHDBVRIS

Deep Water OEWSURLC
Ice Zone XRGQXRIX

The Tube FIVEPODS
Hard Water MAGLXRLM

The Machine ECCOFMLY