It's not just Zynga that's ballooning at a time when traditional publishers are clamping down and cutting costs. A few miles north of Zynga's Townsend Street headquarters, a social game developer called Kixeye has just moved into its new office in the heart of Downtown San Francisco. The studio currently occupies three floors of a high-rise building overlooking the city center. It's a shiny new office with an intergalactic-themed foyer that offers a superficial simulation of being on a spaceship. Best known for its real-time strategy social games, Kixeye is expanding rapidly, opening an Australian studio in Brisbane earlier this year and hiring more than 20 new employees every month. It's expanding so aggressively that, at the time of writing, it has job recruitment ads plastered all over San Francisco's Bay Area Rapid Transit (BART) trains, buses, and stations. The studio plans to have 300 employees by the end of the year.