Chryslus Rocket '69 being added as a free download (only if you play Forza 6 or Fallout 4 on the Xbox one)

(Chryslus Rocket '69 in Fallout 4)

(Chryslus Rocket '69 in Forza 6)

So you can get this car in Forza 6 only if you have played Forza 6 and/or played Fallout 4 on the Xbox one. You will get a code for the download if you have done one or both of the requirements.