The franchise currently has two ongoing titles. The original Forza Motorsport series developed by American developer Turn 10 Studios and Forza Horizon by British developer Playground Games.
Titles
Forza Motorsport
Forza Motorsport is primarily developed by American developer Turn 10 Studios that focuses on simulation racing. Maps in the game consists of both fictional and real world racing tracks.
Forza Horizon
Forza Horizon is developed by British developer Playground Games that focuses more on arcade-style racing while having some aspects of Motorsport's handling characteristics. Horizon is open-world and is set in various fictional representations of real world places. It's centered around the music festival called the "Horizon Festival".