Dead Island Riptide introduces Team quests which are similar to side quests but acquired from your select menu. Doing these will upgrade the survivors and net you exp and gear. check out this guide to finish them all with no problems!
via N4G: pc news feed http://n4g.com/news/1239452/dead-island-riptide-team-quest-guide
via N4G: pc news feed http://n4g.com/news/1239452/dead-island-riptide-team-quest-guide