Namco, frustrated with Nintendo and Sega's licensing conditions for its consoles, agreed to support the PlayStation and became its first third-party developer.[114] The company began work on a conversion of Ridge Racer, its most-popular arcade game at the time.[115] The PlayStation was released in Japan on December 3, 1994, with Ridge Racer as one of its first titles.[116] Sony moved 100,000 units on launch day alone; publications attributed Ridge Racer to the PlayStation's early success, giving it an edge over its competitor, the Sega Saturn.[117] For a time, it was the best-selling PlayStation game in Japan.[6]