The fourth main title of the Project Gotham Racing series, it was released exclusively for the Xbox 360 in October 2007.

[4] The most prominent addition to Project Gotham Racing 4 is advanced weather effects that affect the look of the game and the physics of the cars on the track.

The game simulates ten types of weather, including clear days, clouds, light to stormy rain, fog, snow and even ice.

In the game's expanded and improved career mode, weather is predetermined, which adds an extra obstacle for players to overcome.

Project Gotham Racing 3 emphasized supercars and special models, but did have a few high-performance production cars.

Project Gotham Racing 4 was included as part of the Xbox 360 Live 12 Month Messenger Gold Pack, which included the game, a 12-month Xbox Live Gold subscription card, a wired headset, and a chat pad controller attachment.

A song, called "The Shadow", was exclusively written and performed by The Prodigy and was remixed by Chris Chudley from Audioantics.

[9] As with the prior entry in the series, PGR 4 features engine and exhaust sounds recorded on a dyno from actual cars.

[11] Project Gotham Racing 4 was accidentally leaked by a Peugeot press release for a competition for a car designed by a contestant to be featured in the game before the announcement by Bizarre Creations.

In late 2012, Microsoft removed all PGR4 downloadable content from the Xbox Live Marketplace, and there are no plans to reinstate it.

[17] The Free Challenge Pack introduces the hydrogen-powered 2007 Peugeot Flux, winner of the 2007 Peugeot International Design Competition and two new game modes – Tourist Mode, which allows the player to roam around any city in the game, and Free Roam Cat and Mouse where a slow mouse vehicle must avoid enemy cats.