Santa Clara, Calif. -- Aeria Games, a Santa Clara-based publisher of free-to-play online multiplayer games, said on Wednesday it has landed a new investment from So-net Entertainment, a unit of Sony. So-net becomes the company's second external investment partner, following a 2011 investment by NHN. Financial terms of the deal were not disclosed. "We welcome So-net Entertainment Corporation as a strategic partner as we move forward to expand our relationships with global digital entertainment companies,” said Lan Hoang, the CEO of Aeria. With over 300 employees, Aeria Games is focused on building its presence in the emerging markets of Latin America, Eastern Europe and Russia, alongside its active community of players in the U.S. and Western Europe. The company boasts content partnerships from game companies such as Electronic Arts and NHN, as well as independent developers from around the world.