Half Life 2: Ravenholm is scary? Seriously? What, are you 10 year old girl? I, for one, welcome our zombie apocalypse town overlords. That's my favourite level for the sheer fact you decimate zombies. It should be noted as well that I am a huge zombie fan. This level was practically a theme park for me in all it's visceral glory, and the zombies pained cries of 'DEAR GOD PLEASE HELP MERRAAARGGHHAAAAAAA!!!' only serve to arouse me. A friend of mine (same on from Condemned actually) like a genius, installed a copy of Ep1 on his computer since I left it and a few other games I bought at his house overnight because I didn't have any way to carry them home with the rest of the stuff I had to carry, so I couldn't even my own game. Same thing with the SiN whatever it was. I own two games I can't play because my friend put them under his account. I lost all interest in Half Life after that.
Portal: If this game scares you, your presence among the vertebrate lifeforms on this planet is questionable. Right around the time GLaDOS says something along the lines of 'You will be baked, and then there will be cake', I completely understood what that was to mean and had predicted that I would have to avoid a certain death and then try to survive afterwards until the end. I was half right, and didn't actually expect to have to fight the computer herself. I lol'd at the various nodes, especially the one reciting the cake recipe.