Demon Sword is one of those NES action games that looks cooler than it plays at first glance—you get this massive, screen-filling sword and think you're unstoppable, but then enemies swarm you from all sides. The levels scroll vertically, which was kinda rare back then, and you're basically climbing this cursed tower while slashing through ninjas, demons, and whatever else the game throws at you.

It's got that classic "Nintendo hard" vibe where you'll die a lot until you memorize enemy patterns. The sword upgrades help, but good luck keeping them after a hit—one wrong move and you're back to swinging a toothpick. The music’s got that crunchy FM synth sound, and the bosses are ridiculous in the best way. Just don’t expect a deep story; you’re here to hack, slash, and maybe throw a fireball or two.

If you’re into retro games that don’t hold your hand, this one’s a solid time capsule from 1989.