Here are some cheats and tips for the game Double Dragon 2: The Revenge.
Extra lives:
Select two-player B mode and begin game play. Keep defeating
player two to gain up to seven extra lives.
Continue game play:
Quickly enter one of the following codes at the game over
screen after completing the indicated level. A “Continue/Start”
option will appear. Press Start on controller one to continue
the game at the end of the last level played.
Levels 1 to 3
Press Up, Right, Down, Left, A.
Levels 4 to 6
Press Up, Down, Left, Right, B,
A(2).
Levels 7 to 9
Press A(2), B(2), Down, Up, Right,
Left on controller two.
Playing level 4:
Pause game play and wait several seconds when the door on
the helicopter opens. The door will close when game play resumes.
Playing level 9:
Level 9 only appears if the game is played under the “Supreme
Master” difficulty level.