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

The Rarest and Most Valuable NES Games - RetroGaming with Racketboy

Ninja Gaiden (NES) – Hardcore Gaming 101

35 years ago I finally bought my own NES. Here are my top 5 games. : r/nes

The MOST DIFFICULT Retro Game Ever Made? — NINJA GAIDEN (1988)

Is Ninja Gaiden the hardest game ever? - Quora

Hardest games EVER: Dark Souls, Battletoads, Ghosts N Goblins - how many have you finished, Gaming, Entertainment

What Was the Best Super NES Game Ever? - Talking Point

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GameSpy: GameSpy's 50 Favorite Console Games of the '80s - Page 19