The following is a list of Public Address Announcements heard throughout BioShock. Rapture Radio, advertisements, and messages were intended to keep the citizens of Rapture feeling informed, safe, and secure in the underwater city, as well as try to convince them to buy Plasmids and other products. With the Rapture Civil War, the messages were modified to tell the remaining citizens to keep a watch for the "Parasites" and to ignore the "lies" of Atlas and his followers. When the city fell into disarray, the messages were left on a constant loop and forgotten about.