every single boss in super gouls&ghost game.

Hardest game I have ever beaten and that was when I was around 15 years old, now? it would be impossible for me to beat.

Scarey wise, the floating brain boss at the end of stage 1 on Lifeforce. Pyramid head and Jame's wife from Silent Hill 2 also deserve mention.

Toughest would probably go to Shen Long in Bloody Roar Primal Fury, damn cheap ass.

I guess for scariest it would be Nemesis.

For me BOSS battles are typically easier than other parts of the game, for instance Mother Brain in Metroid, I beat her in a snap on my friends save before I could get through the game myself.

Right now I really can't remember any others off the top of my head.

Zelda OOT - Fish Boss was annoying, but not as bad as the whole level, carrying the dumb princess bitch...wheres that useless side char thread!

Dead or Alive 3 was just ridiculous.

I'm tossing up the Gila Monster from Deadly Creatures in terms of fear--it doesn't look like much from a video, but when you actually have to physically perform the actions required to escape from him, all while dashing out of the way of his charges, it's damn scary.

Bioshock's Big Daddy should be in here. Just imagine running into that in real life.

yeah, the sound of the thing definatly put you on alert ^

Omega Tom Hanks - M.U.G.E.N.

He was scary and hard, the only thing creepier was Shamoo. V_V

Hardest boss goes to the Alt+F4 button.

^ RIIIIGHT ON! I remember MUGEN

I hate the Redead, they're so annoying.

I haven't encountered any real scary enemies yet, haven't played any horror games! :D

Scary enemies for children
Anything from the Shadow Temple in OoT
Bowser
Anything else previously mentioned.