Special 2: Have some poison poured in your ear.
You will get to a scene where Dr. Hartman is talking to you as a memory. After a long conversation, you must press on the recorder nearby and listen. Once it ends, the lights will turn on. Continue on and as Alan talks, the achievement will unlock.
Note: It's possible to skip this and continue on, so remember to stay until the conversation has ended and you have listened to the recorder before leaving.