Board Thread:Questions and Answers Forum/@comment-81.61.144.18-20150519194304/@comment-24057866-20150523044300

In order to unlock the The Dark Below missions, you have to visit Eris in the Tower and complete her quests. In order to unlock the House of Wolves missions, you have to visit Petra in the Reef and complete her quests. These NPCs will be marked with a green exclamation point on the maps.