Amnesia, Probably because of the fact that you have no means of defence.
But when i was young (Like 8 years old i think) Metroid 2: The return of Samus scared the living shit out of me
But when i was young (Like 8 years old i think) Metroid 2: The return of Samus scared the living shit out of me
SPOILER
The part when you've killed all the Metroids exept the last one, going through the tunnel in a spider ball and seeing that Metroid egg, slowly going away from it and then hearing the sounds of rumbling and creation, seeing the ammount of Metroids going up to 9 and the music getting even creepier, while it already was creepy, On top of that not knowing how to kill these newly spawned Metroids, Probably one of my most firghtening experiences so far in life.