How about one of the hardest NES games ever made Ninja Gaiden : r/nostalgia

Ranking The 20 Hardest NES Games Ever Made

Ninja Gaiden II: The Dark Sword of Chaos Review (3DS eShop / NES)

10 NES Games That Made (Almost) Everyone Rage Quit

Is Ninja Gaiden the hardest game ever? - Quora

The 20 hardest games for the original NES console

The 20 hardest games for the original NES console

This is the hardest level of any video game I've ever played. What were they thinking? : r/castlevania

Ninja Gaiden II: The Dark Sword of Chaos Review (3DS eShop / NES)

Collective Review: Ninja Gaiden Trilogy » Old Game Hermit

I just beat Ninja Gaiden for the first time! : r/nes

The Rarest and Most Valuable NES Games - RetroGaming with Racketboy

Just beat 2 NES classics on original hardware! Which should I play next? : r /retrogaming