Beer, Pizza, and Death
All character backgrounds and races are allowed. Classes are slightly restricted. Because of the changes to resting Sorcerers and Warlocks are banned – otherwise they quickly overpower Wizards. Plus digging around the dungeon looking for lost books of magic is going to be a significant part of the campaign. Additionally a number of classes are discouraged but still allowed. Paladins and Monks are traditionally quite lawful, and seem a poor fit for a grave robbing adventurer. Druids and Rangers are most at home in the wilderness, while this campaign occurs entirely in a town or underground. Finally, when choosing an alignment or a god (if a cleric) keep in mind that you are playing a grave robbing adventurer. Lawful good would probably be a poor choice.
Be sure to come up with a character motivation.
Also be sure to check out gods of Strigia if playing a cleric or paladin.
Barbarian, Bard, Cleric (non-lawful), Fighter, Rogue, Wizard
Discouraged but totally allowed
Druid, Monk, Paladin, Ranger