The game basically consists of missions. You get a mission, and travel through the umbilical to the area where it takes place, and you do it. While it's been said that Harbinger offers three different stories for each class, this basically all boils down to getting sent to an area to get an item and bring it back. Along the way to the item, kill everything in your path or else it'll kill you. Some of these missions are given to multiple classes, with the same level lay out for each. However, despite some missions being different per class, the missions are all the same in terms of how they play and the goals involve. Go. Kill. Fetch. Return.​