Lead designer Dan Greenawalt and his team looked to the Gran Turismo series, and also played Animal Crossing and Diablo II for inspiration. They also hired a former designer from the Pokémon series to work on the game. Greenawalt explained that they wanted to make a "car-collecting game" and tried to implement the best elements from the aforementioned games and franchises that they considered to be "especially good at delivering superb collecting and ongoing social experiences".
Contributed by GamerBen144