Polyphony Digital is an internal Japanese first-party video game development studio of Sony Interactive Entertainment, part of SIE Worldwide Studios. Originally a development group within Sony Computer Entertainment known as Polys Entertainment, after the success of Gran Turismo in Japan, they were granted greater autonomy and their name changed to Polyphony Digital.
Created the legendary Gran Turismo series, and changed the way how racing sims look and play.
The company's founder, Kazunori Yamauchi, states he is trying to improve the game.
The company never rushes their games, nor do they try to milk the Gran Turismo franchise to death, unlike it's maincompetitor.
Their Gran Turismo games often have great graphics for their respective times, and have plenty of detail.
Not only do they specialize in racing games, but they are also involved in several other projects outside of gaming, such as the development of the Nissan GT-R.
Their 2 most recent Gran Turismo games (being 6 and Sport) have content that has been approved by the FIA, making them serious racing games.
Their games have always been well received, including Gran Turismo Sport despite being considered a step back from previous entries.
They have been bringing more cars and single player content to Gran Turismo Sport since launch after criticism for a lack of a substantial single player career mode. This shows they are willing to listen to criticism and feedback.
Every Gran Turismo game since Gran Turismo 3: A-Speccan break the limit of 2147483647 in money when you use hacks.