Better known today as the developer of Skyrim and Fallout, Bethesda once had a well-respected racing game franchise and were deep into development of a licensed Skip Barber Racing title that never released.
Asobo, known today as the Microsoft Flight Simulator developer, created groundbreaking technology for large scale maps that was intended to be used in a high quality rally raid title. It was never released and ended up as FUEL, a post-apocalyptic open-world racing game. What happened?
NTG is a NASCAR simulation based on the 2012 season which used the Gen-5 Cup car. Gen-6 2013 Cup cars were made available as DLC.
IndyCar Series is a 2003 racing game based on the 2002 Indy Racing League and Indianapolis 500 developed by Brain in a Jar and Codemasters. It includes 24 regular series drivers and two from the Indy 500 that year.