Streets of Rage

Cheat mode:
Highlight the "Options" selection on the main menu, hold Right + A + B + C on controller two, and press Start on controller one. This will allow level selection and game play with seven lives.

Extra continues:
Press Left(2), B(3), C(3), Start at the title screen.

Bonus points:
Defeat the level 3 Boss and use the special weapon before he lands on the ground to receive a 5,000 point bonus.

Secret options:
Press Start on controller two at the title screen. Use controller two to highlight the "Options" selection, hold A + B on controller two and press Start on controller one. The "Easiest" and "Mania" difficulty levels may now be selected.