Grimrock

Question about a spot in the Old Sewers: I got to the point of placing the 8 skulls to open the secret with the tome of knowledge and the potions. However, when I opened the secret button in that room to leave, it closed the door into the main area of the skulls, and now I can't reach the skulls ag...

They're not spiders. They are aliens that have shape shifted to look like spiders, and they have done this because they are afraid of you. Really they don't have a single spidery particle in their body. Either way, keep killing them, and you'll get even better at killing them, until eventually you'l...