Space Invaders

Codes

Cheat Mode

At the Main Menu and while highlighting Play, press Left, Left, Right, Right, Left, Right, Left, Right, Left, Left, Right, Right. A new menu named Test will appear with a Stage Select, as well as an Invulnerability option.

EffectCode
Cheat ModeLeft, Left, Right, Right, Left, Right, Left, Right, Left, Left, Right, Right at the Main Menu.

Passwords

EffectPassword
Classic ModeCLSS1281999DBM
Earth?Z70JXMRBR01B?
Invader Homeworld??Z1LZ2X?PR1YD
JupiterRSSN3QJ78?GJMC
Mars?WZ4VCLN4W81V?
NeptuneHV27RW1GN3Y0R7
PlutoMV7HRCLHS3ZSR9
SaturnWSPZMS08N?H8NF
UranusCV1?QWKGJ3X8R5
Venus3XLFVNLKN?T5RC

Gameshark Codes

010269D7     Infinite Ships
010419D1     Aliens Can't Shoot