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RPGA is free to join organization backed by Wizards of the Coast. They run active campaigns across the world through sanctioned DMs. Any RPGA DM can run a game containing RPGA sanctioned characters. I'd be more active in the RPGA but my card is defunct and I haven't tried to join an RPGA game at a convention since one summer back in high-school. It just isn't as fun as I thought it would be. The only active RPGA chapter in my local area is bit inconvenient for me to get to, besides I have an active gaming group so I don't really need the RPGA.