In Amnesia, you obviously want to avoid all monsters. Most commonly, you encounter zombie-like creatures that you really don't want to mess with. I'm talking about these pretty princes (image is a little PG).
Sometimes, however, you're forced to sneak around near them, and you can get into some pretty hairy situations. To avoid something going wrong, I was hoping for some sort of guide on how these monsters can "sense" me; can they hear me if I'm loud? How easily do they see me? How do I lose one that's chasing me? Overall, what determines whether it will notice and attack me or not?