Prior to joining the USC faculty, she was president and founder of the interactive television game developer, Spiderdance, Inc. Spiderdance's games included NBC's "Weakest Link", MTV's "webRIOT", The WB's No Boundaries, History Channel's "History IQ", Sony Game Show Network's "Inquizition" and TBS's "Cyber Bond". Before starting Spiderdance, Fullerton was a producer and creative director at the New York design firm R/GA Interactive. While there, she created games and interactive products for clients including Sony, Intel, Microsoft, AdAge, Ticketmaster, Compaq, and Warner Bros. among many others. Her projects include Sony's Multiplayer Jeopardy! and Multiplayer Wheel of Fortune and MSN's NetWits, an early multiplayer casual game launched in 1996. Additionally, Fullerton was Creative Director at the interactive film studio Interfilm, where she wrote and co-directed the "cinematic game" "Ride for Your Life", which starred Adam West and Matthew Lillard. She began her career as a designer at Robert Abel's company Synapse, where she worked on the interactive documentary "Columbus: Encounter, Discovery and Beyond" and other early interactive projects.