Dead Rising/Transmissionary

To get this achievement simply answer and listen to all the calls that Otis gives you on the walkie talkie during the entire 72-hour mission. You will need to go through most of the 72 hour mode doing the cases for you to receive all Otis's calls. You will not receive calls if you are in the security room, on the roof, or in the area of the scoop/survivors.

Five Survivors are also needed to complete this achievement: Ronald Shiner, Floyd Sanders, Kindell Johnson, Cheryl Jones, Paul Carson, and Simone Ravendark. The details are on the ../Survivors/ and ../Scoops/ pages