All members of the Atomic RPG System need to have a Atomic RPG System account created. Unlike many websites that use Facebook just to validate users, AtomicRPG.com needs to have a Atomic RPG System account built so it knows who your PCs, NPCs, Powers, and Items belong to. All of this information is stored on AtomicRPG.com so all members can have their own set of custom Atomic RPG System goodies. This also keeps track of your Atomic Friends, submission rewards, etc.
Once the account is created members can link their Facebook accounts to their AtomicRPG.com account. This is nice so members do not have to remember another websites username/password. If a member is logged into Facebook, they will also be logged into the AtomicRPG.com. There are a few other social network options that are also available for your convenience.
AtomicRPG.com does not use these linked accounts for anything other than verifying the user matches the AtomicRPG.com account.