Gust (株式会社ガスト) is a Japanese developer and publisher of video games, known for their Atelier and Ar tonelico series. The company is a wholly owned subsidiary of Koei Tecmo. The company began by creating dojinshi games for personal computers. Its first project was Story of King Ares for the NEC personal computer. In 1994 the company became an official developer for the Sony PlayStation video game console, and its first PlayStation product was the simulation game Falkata. In 1997, Gust released Atelier Marie, the first game in the long-running, popular, and iconic Atelier series. Since then the company has released several successful games for various home and portable video game systems. It was announced on July 28, 2014 that Gust will formally merge with its parent company Koei Tecmo on October 1, 2014, and will continue to develop existing game series and new intellectual properties as "Gust Nagano Development Group".