Play as Samus with Bonus Weapons - Enter JUSTIN BAILEY as a password. Note: Fill the remaining characters in the password with dashes.
Alternate Game - Enter 999999 999999 KKKKKK KKKKKK as a password with no Varia suit and a different ending
Super Jump - Hold Right on controller two and press A on controller one.
Quit Game Play - Press Start to pause game play. Hold Up + A on controller two to display the current password.
Begin with Wave Beam - Enter Password 000000 000000 G00000 000010
Begin with Weird Looking Ice Beam - Enter Password: 000000 000000 G00000 000010
Slightly Powered Brimstar - Enter Password: 007ltp W20000 025kHa 8A00?Y
Ridley - Enter Password: 00U--- -u0000 0AFw9Y 1800sb
Ready For Kraid - Enter Password: 0Gz--- -m3e0G 00VvjS 3m00n?
Tourian - Enter Password: M7---- --zOA0 2T-tfm a000d5 atop
In suit, end of game - Enter Password: uVt-Fg boo-W7 9t?lM0 O00Gsi
In suit, end of game (best ending) - Enter Password: X----- --N?WO dV-Gm9 W01GMI
Play as Samus with all arsenal weapons - Enter Password: mMuiS1 II6-GE Jls?h0 m00WRM
Odd ending - Enter Password: Daniel Daniel Daniel Daniel
Second quest - Enter Password: 022400 A00000 05?00m 0000aS
Second quest, without suit - Enter Password: 0WX002 W00004 1VW0C0 0000MO