San Francisco Ballet continued to serve as the school's director until his retirement in 1975. In 1938, the company's first major production was "Coppélia", choreographed by Willam Christensen. In 1940, it staged "Swan Lake", the first time that the ballet was produced in its entirety by an American company. On Christmas Eve 1944, the company staged "Nutcracker"—the first complete production of Tchaikovsky's most popular piece ever danced in the United States. In 1942, San Francisco Opera Ballet split into two independent companies, ballet and opera. The ballet half was sold to Willam and Harold Christensen. Willam became artistic director, while Harold took on
Sega Studios San Francisco was to be used for a massively multiplayer online role-playing game called "Proteus", a successor to "Star Wars Galaxies". Development of Pangaea was halted in 2004 after Lucasarts reorganized under Jim Ward. Some of the ideas later informed the design of the studio's internal Riders engine used on "" and "Iron Man". Sidecar was a standalone UI authoring tool and SDK. Sidecar was used on several projects both internally and externally, among them, "", by Z-Axis. Sega Studios San Francisco Sega Studios San Francisco, formerly known as Secret Level Inc, was an American video game developer based in San Francisco,