You can locate Metal Scrap at the pump building in Marik's Marina, as well as finding one or two pieces near the south entrance of Paradise Camp (go down the stairs to the landing with three non
When Riptide released 18 months after the original Dead Island, there was some cause for concern; Techland, a developer not necessarily renowned for the quality of its output, seemed to be pushing "Juggernaut (Achievement)" is one of the achievements and trophies available in Dead Island: Riptide. To unlock this you need to kill 100 zombies with Sam B's charge skill. It will unlock upon the death of the 100th zombie. Only the final blow needs to be struck using charge. The easiest way to achieve this would be to get the zombie to low health first, then charge into them to finish them Mutagen is a substance mentioned in Dead Island: Riptide and it is hinted that it is the cause of the special infected you fight over the course of both Riptide and the original Dead Island. Dr. Kessler first mentions mutagen when you meet him in his biodome. He's performing experiments and tests using some of the already deceased scientists to study the effect that various mutagen substances