[Sughly]

Originally Posted by dog of war

Been alluded to, but the creepiest adventure games I've played have been the
Chzo mythos ones, made by Yahtzee, the guy who does the Zero Punctuation reviews. Creepy, fun and best of all free.

I only ever played the first title of the series, but I didn't find it particularly creepy. I think it was the characters and their humour which just took the edge of that off the game for me. Don't get me wrong - I loved it, I think the characters and the dialogue were great, just that it wasn't necessarily creepy...