Psyonix

Psyonix is an American video game development studio based in San Diego, California. The company focuses on its own development, as well as contributing to larger companies and publishers utilizing the Unreal Engine. Psyonix was founded in the year 2000 by Dave Hagewood, after developing Internet and multimedia software under the name WebSite Machines. Its first game project was Proteus.

Source : IGDB