The First 15 Minutes of Rush Rush Rally Racing (Dreamcast)

Copied from MobyGames:

Rush Rush Rally Racing (or R4, for short) is an old school 2D top-down racing game. The game features no sponsored cars, no realistic environments, just action-packed arcade game play!

Originally intended as a small coding exercise, the project soon grew to such proportions that it compelled the creators to turn it into a complete game.

The title makes sense because the four R's represent the number of players that can simultaneously enjoy this game.