Complete the "Drowning Pool" level. You will appear in a "Hellhole" in a building. You will see Ramse Truman sitting on the floor, who will tell you about his findings in both games in the series. Explore building and destroy the Mainliner needles on the floor and stuck in bodies. Also destroy the three Slayer's heads located on the shelf at the front door, on the desk near the television, and on the desk near the "Hellhole". The blocked door at the "Hellhole" room can now be opened. It leads to a programmers room that contains dirty pictures, the lead programmer's body at a desk, various other game discs (including Mortal Kombat and The Suffering), and a telephone message from a patient of Dr. Killjoy from the first The Suffering.
Eventually you will encounter a police officer who will ask you to free him. He will also tell you not to turn the three valves in front of you or he will die. If you want to save him, you must first have a full insanity bar. You can get to that state by going back to the previous room and killing the respawning enemies. When you have a full insanity bar, open the door and go into the room with the three lockers on the wall. Go into the room after that. Look around you should see a broken wall. Transform into your insane form and carefully destroy the broken wall, making sure you do not kill the police officer. Transform back, and when the police officer runs out and sits down, your good deed will be done. To progress into the level, turn the three valves and stand back. When they explode the previously inaccessible room to the left of the valves, will now be open.