Ridge Racer 6

It is the last Ridge Racer game made by Namco as an independent company, as they would later merge with Bandai's video game division to form Namco Bandai Games in 2006. Followed by Ridge Racer 7 on PlayStation 3, a largely enhanced and expanded version. The game was added on the Xbox backward compatible list in November 2021 as part of the Xbox 20th anniversary, playable on Xbox One, Xbox Series X and Series S consoles.

Like previous Ridge Racer titles, the focus of gameplay is on placing first out of 14 in numerous 3-lap races across several tracks and various cars. In most races, the player can earn up to three nitrous boosts by successfully drifting around corners without crashing, which can then be used to provide a short burst of speed. Some races are labeled as "no-nitrous", which prevent the player from earning any nitrous during the race, though nitrous can still be optionally enabled. If the player wins using this option, the race is considered complete, but noted for breaking the no-nitrous rule. Some races are also Duels between the player and a boss opponent, who is usually equipped with a much better car. Ridge Racer 6 introduces a career-mode "World Xplorer", a branching-tree arrangement of races in which the player can only attempt races next to a race that has already been successfully completed. The layout of the races in the Xplorer is such that the position of a race will indicate what class of car can be used (horizontal position) and the difficulty of the course (vertical position). Rewards can be obtained by completing certain races or finishing all races that enclose an area on the Xplorer, and usually offers new cars, but also include extra variations of the tracks (mirroring and reverse) or new branches added to the tree. A player can also engage in quick races and time challenges for any track and car that has been unlocked. Like other Ridge Racer games, this iteration goes beyond cars to feature other outlandish vehicles as well, called "special machines". These include a hovercraft (Assoluto Pronzione), a tripod supercar (Himmel 490B) and an oversized SUV that can be very loud (Danver Bass Cruiser). The game, as with all games in the Ridge Racer series, contains copious numbers of references to other Namco games, like Pac-Man, Soulcalibur, and Ace Combat. There are a total of 30 new circuits available including "Surfside Resort" and "Harborline 765". There are also around 130 cars (including 10 special). Online multiplayer is possible with up to 14 players racing against each other and downloadable content was available through Microsoft's Xbox Live service. Players can download another player's "ghost" replay from Xbox Live and attempt to beat it. There are 15 circuits available, each of which can also be raced in reverse, making a total of 30 circuits. The circuits are split into 5 groups of 3, where the 3 tracks in the same group will overlap. The game also features a FMV opening, starring series mascot Reiko Nagase. She is also featured in a hidden in-game message.

Ridge Racer 6 is the second game after Ridge Racer (PSP) to feature composers from both the older and newer game sound teams. Hiroshi Okubo served as the game's sound director, while the soundtrack also has contributions from in-house composers Keiki Kobayashi, Rio Hamamoto, Tetsukazu Nakanishi, Yuu Miyake, Koji Nakagawa, Junichi Nakatsuru, and Akitaka Tohyama. Several contractors who formerly worked in-house include the original Ridge Racer sound team consisting of Shinji Hosoe, Ayako Saso, Nobuyoshi Sano, and Takayuki Aihara, as well as Asuka Sakai and Kohta Takahashi, both of whom composed for R4: Ridge Racer Type 4. Music from the previous two games in the series, Ridge Racer (PSP) and R: Racing Evolution, was made available for download through the Xbox Live Marketplace in 2006. Due to high demand from fans, a soundtrack CD titled Ridge Racer 6 Direct Audio was released under SuperSweep Records on 14 January 2009. An extra disc was also included with purchases from SuperSweep's web store SweepRecord, featuring a DJ mix of its music by Yousuke Yasui.