I was an itty-bitty boy when Zelda: Link's Awakening came out for the big damn brick called Game Boy; I'm not even gonna try to cover for the fact that some of the music and situations scared the hell out of me, at first. I made my brother play against the bosses because the themes... Okay, normally, a boss theme will be daunting, but have a small element of "you can do this, you are the hero!" LA's boss theme did not have that, only absolute terror and inevitable, agonizing death. Shoot, even the mini-boss theme signaled one thing: you are in trouble, be afraid.
Thankfully, I got over that quickly enough, so I could enjoy the best portable Zelda game properly.
Little Ninja Brothers for the NES. I was, like, 5, with an imagination so overactive I swear I used to hallucinate characters. Again, looking at some gameplay footage now, it's not scary in the least, but way back then, I about lost my damn mind over some of the imagery. For some reason, I only vaguely recall how, sometimes, during combat segments, the regular mooks would run away and a massive, unkillable minotaur would rush in with a sudden shift in music.
Yeah, I was kinda a coward when I was little. Other kids imagine monsters under their bed, I imagined big hecking minotaurs that wanted to stomp on my squishy self.
Gobliiins! Yes, 3 i's. It's a puzzle game in a fantasy setting, but some of the visuals were terrifying to, you guessed it, itty-bitty me. Zombies that could frighten you to literal death (game over) just be waving their arms around, voodoo dolls that made a guy scream with pain, death traps of all shapes and sizes around every corner... yeah, let's just say I stuck to more conventional platformers for a good long while.