D-Pad Hero

[Ryudo Lee]

D-Pad Hero, a unique twist on the rhythm game, now for NES (emulators)!

Probably the most difficult NES game made to date.  The article I found about this said "it's harder than if Mega Man 9 and Ninja Gaiden Black consummated and gave birth".  They're right.

[techmaster-glitch]

I doubt it's harder than the immortal classic, I Wanna Be The Guy.

[Kafzeil]

Or La-Mulana's aptly named Hell Temple.