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Polyphony Digital, Inc. is a long-time Japanese game developer owned by Creator/SonyInteractiveEntertainment, best known for the ''VideoGame/GranTurismo'' series. While the studio in its current incarnation was founded in 1998, its inception dates back to 1994 as Polys Entertainment, which used to be a small group within the early days of Sony's gaming division.

As of 2021, Polyphony Digital is one of Sony's oldest teams[[note]]With the disbandment of Creator/SIEJapanStudio in April 2021, Polyphony is Sony's oldest internally-founded studio[[/note]]. Their first two games (as Polys) were ''VideoGame/MotorToonGrandPrix'' and its sequel, the former which [[NoExportForYou wasn't released outside of Japan]]. While the second game received favorable reception, it wasn't until the ''Gran Turismo'' series that Polyphony was born.

1997's ''VideoGame/GranTurismo'' was the labor of five years in development and quickly became one of the biggest [[KillerApp killer apps]] of the Platform/PlayStation brand. That game's success secured Polyphony's existence as its own entity, and the studio has been working on the ''Gran Turismo'' series ever since. It is Sony's [[CashCowFranchise best-selling franchise]] with over 80 million copies sold, and main entries regularly sell between 5 to 10 million copies.

As Polyphony Digital, they have only strayed away from the ''Gran Turismo'' series twice. The first one was ''VideoGame/OmegaBoost'', which to this day remains their only non-DrivingGame title; instead, it's a MechaGame. Their other title is ''Tourist Trophy'', an attempt to explore the DrivingGame genre through {{Cool Bike}}s. While neither game reached the acclaim and popularity of Polyphony's CashCowFranchise, they remain {{Cult Classic}}s.

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!!Video games developed by this company:
* ''VideoGame/MotorToonGrandPrix'' (1994)
** ''Motor Toon Grand Prix 2'' (1996)
* ''VideoGame/GranTurismo'' series
** ''Gran Turismo'' (1997)
** ''Gran Turismo 2'' (1999)
** ''Gran Turismo 3 A-spec'' (2001)
** ''Gran Turismo Concept 2001 Tokyo'' (2002)
** ''Gran Turismo Concept 2002 Tokyo-Seoul'' (2002)
** ''Gran Turismo Concept 2002 Tokyo-Geneva'' (2002)
** ''Gran Turismo 4 Prologue'' (2003)
** ''Gran Turismo 4'' (2004)
** ''Tourist Trophy'' (2006)
** ''Gran Turismo HD Concept'' (2006)
** ''Gran Turismo 5 Prologue'' (2007)
** ''Gran Turismo'' ([[Platform/PlayStationPortable PSP]]) (2009)
** ''Gran Turismo 5'' (2010)
** ''Gran Turismo 6'' (2013)
** ''Gran Turismo Sport'' (2017)
** ''Gran Turismo 7'' (2022)
* ''VideoGame/OmegaBoost'' (1999)
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