Rad Racer, known as Highway Star in Japan, is a racing video game developed and published by Square for the Nintendo Entertainment System (NES) in 1987. In this game, players drive a Ferrari 328 or a generic Formula One racing machine through a racecourse. The game was released in North America and Europe months after its debut. The title became well known for being one of two titles from Square that made use of stereoscopic 3D, which was made possible by wearing a pair of anaglyph glasses. Square president Masafumi Miyamoto initially conceived the game as an opportunity for developer Nasir Gebelli to demonstrate his 3D programming skills. Gebelli developed, and often drew by hand, the graphics for the game's 3D mode.

Racing games are a video game genre in which the player participates in a racing competition. They may be based on anything from real-world racing leagues to fantastical settings. They are distributed along a spectrum between more realistic racing simulations and more fantastical arcade-style racing games. Kart racing games emerged in the 1990s as a popular sub-genre of the latter. Racing games may also fall under the category of sports video games.