Last Chance on the Wall is a hard quest given to the Hero by Howard Craigson.
Synopsis
The Hero is asked by a man named Howard Craigson to hang posters around town to inform anyone that may know him where his wife and child are located, as it is told that he has been separated from them since when they were attacked by some Infected. The Hero is then given locations to put the posters and must fight zombies in order to reach them and put the posters safely.
The quest is designed as a walking tour of Moresby. It avoids the Quarantine Zone but takes the Hero by key locations like the Police Station, Simon's Hub, and Nick's Hub.
Video Walkthrough
Dead Island Walkthrough - Side Quest - Last Chance on the Wall