What system designed by N. Robin Crossby features at Fandemonium?
Fandemonium (convention):  The convention has featured role-playing games such as "Dungeons and Dragons" and "HârnMaster", cosplay groups and competitive contests for costume designs, collectible card games like "Magic, the Gathering", computer games, and more. HârnMaster:  The system, like the world, was designed primarily by N. Robin Crossby.
i don't know