In the Core Rulebook for Edge of the Empire, Obligations are presented as a key part of a character's foundation. They are part of the reason why a character lives the way they do, eking out a living on the fringes of society and staying only one step ahead of their debts and responsibilities. They tie them to the greater galaxy and potentially to other party members, in addition to plaguing the group when their particular Obligation comes knocking.
Enter the Unknown modifies the original Obligations chart to better apply specifically to the Explorer career. In this way, players of Explorers can randomize their Obligation with a higher chance of getting results that make sense for them while having some interesting and more applicable new options from which to select.
Characters that are already in play shouldn't need to reconstruct their Obligations, at least not without a good, in-story reason. However, if players and the GM work it out, some of the new options presented here can become new Obligations incurred as a result of new story arcs. As with all things in gaming, whatever works best for the players and their GM is acceptable.
Some explanations of each of the presented Obligations can be found on the table below, especially as they might apply to an Explorer. This table is a modified version of the Obligation table from the Core Rulebook, adapted to include the new Explorer-centric options, Fervor and Sponsorship.