Abyss Modified ended up being a long-term game store adaptation of the Out of the Abyss campaign by Wizards of the Coast. Multiple things changed along the way, from table composition and size, too adventure hooks and final quest goals and tasks. If you plan on running Out of the Abyss yourself, please feel free to borrow bits and pieces as you see fit, just remember where you got them from. The entire second half of the campaign was rewritten to accommodate the party not wanting to return to the underground.