R4: Ridge Racer Type 4 is the fourth game in the Ridge Racer series on the PlayStation. Unlike some of the other titles in the series, this game is made only for a home console, and does not have an arcade machine version. It is the final Ridge Racer series game released in the PlayStation console before Ridge Racer V released exclusively on PlayStation 2. There are 8 tracks and 321 vehicles, all of which are fictional. This iteration was one of the first games on the PlayStation to feature gouraud shading on the polygons, giving the game a visual depth that was previously missing. It was also the first Ridge Racer game on the Sony system to feature a two-player split screen mode, and featured two different driving models.