Guerrilla War

Level and difficulty selection:
Select a one or two player game, then hold A or B and press Start to begin game play.
Alternatively, hold A + B and power on the NES.
Continue to hold those buttons and press Start(2).

Continue game play:
Hold A + B immediately after the game over screen appears.
In a two player game, press A, B(2), A.

Options:
Press Select + Start + B at the player number selection screen.
Press Up or Down to select an option, press A to change the current option, and press Start to begin game play.