My Game has come to a stand still and I don't know what to do next so I need your help. My current position in the game is that I have been in the underground sewer by shuting of the waterfall and I have been everywhere in there. I have some items but I don't know where to use them. I have a doom book 1 and 2 , a mo disk and a broken shotgun but carnt find the room for it. I went up a lift in the underground sewer where I saw a pool thing and a weled door but I don't think that is anything special. Plz I need help what do I do.