Monster Ock from Spiderman PS1... Literally everything about it is nightmare fuel. His look, the sounds he makes, and to top it off the fact that you have to run away from him. Chase dreams are a huge theme, so damn them devs for this shit.
https://www.trueachievements.com/gamercards/SliferCynDelta.png%5B/IMG%5D">https://www.trueachievements.com/gamer/SliferCynDelta"><img src="https://www.trueachievements.com/gamercards/SliferCynDelta.png