Ninja Gaiden II: The Dark Sword of Chaos Cheats, Codes, and Secrets for NES

Codes

Effect	Code
Musicruise sound test	Let title screen fade to black, press start, repeat, then hold up+left+select+A+B and press start.
Sound test	On the title screen, hold up+left, select, A, and B all at once. Then press start.

Contributed By: J.Lau and alex cross.

Ultimate Sound Test
At the title screen, press and hold Up, Left, A, B & Select and press Start. If done right, a music test with a chibi Ryu will appear. Press Start to exit to the title screen. Now, let the title screen fade to the intro and press Start to go to the title screen again (see title screen twice), press and hold Up, Left, A, B & Select and press Start. If done right, a music test with a chibi Irene will appear. Now for the ultimate music test: press Start to exit to the title screen. Let the title screen fade to the intro, press Start to go to the title screen again, let it fade again and press Start a second time (see title screen three times), now press and hold Up, Left, A, B & Select and press Start. If done right, a music test with channel and volume controls will appear.
Contributed By: ReyVGM.
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Extra lives
Near the end of stage 4-2, there's a 1UP. Get it, and then go back up the ladder and out of that area. Return, and the 1UP will be there again. Repeat this process until you have as many lives as you need.
Contributed By: terrisus.
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See through the darkness in Stage 3-1
Lighting occasionally illuminates the dark screen in Stage 3-1. Pause the game and wait for the lightning to come.
Contributed By: Lcadwallader.
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