We are playing by the standard Dungeons and Dragons 5th Edition Players Handbook. We are also adding all additional content as made available by the following official texts: Sword Coast Adventurer's Guide Tasha's Cauldron of Everything Xanathar's Guide to Everything I am open to adding any other official rule sets from other official texts. They would need to be discussed in advance in order to apply. For example, there's a Campaign Book on Baldur's Gate with a tremendous amount of flavor text regarding people from that area, additional traits, etc.