Kill Buck with the Fire Extinguisher (obtained from the Apartment's Kitchen on the Ground Floor) on the Training Day. Wait out your shift, return to your Apartment and sleep. Keep sleeping until you reach Day Four. Head to the Facility, you will encounter the gangsters which will subsequently lead you to the place where you obtain Playing House. Now, instead of letting the Android beat you up, reprogram it with the Android Reconfiguration Device and proceed to escape the Lower Levels. Once you are in front of the Facility, continue left until you get to the Train Station. Get on the train, and let the ending commence.