That massive 53 GB Forza Horizon 3 update on Windows 10 was an accidental public release of a developer build

Reading time icon 2 min. read

Readers help support Windows Report. We may get a commission if you buy through our links. Tooltip Icon

Read our disclosure page to find out how can you help Windows Report sustain the editorial team Read more

Just yesterday we reported on a known issue where a massive 53 GB update made its way to the Windows 10 desktops of Forza Horizon 3 players. While there were not many immediate details on what caused the update to be pushed out, we have since learned that the update was an accidental public release of a developer build (via Windows Central.)

Word on what caused the issue was first spread by Forza Community Manager, Brian Ekberg on the Forza Motorsport forums. He explained that an incorrect PC version of Forza Horizon 3 was pushed out, and players should uninstall version ending on .37.2 and re-install in order to avoid corruption of saved data.

  • The incorrect PC version of FH3 has now been removed and replaced. PC players who have the FH3 version ending with .37.2 should immediately uninstall that version of the game, then re-install. The correct playable version should end in .35.2.
  • PC players who completed the download of .37.2 and then started a new game save will have a corrupted saved game. Avoid creating a new saved game on .37.2, and only play on .35.2 to avoid this issue. As long as you have an existing save and have not created a new one on .37.2, your saved game will work correctly once the update is available.
Forza Horizon 3 car

On the bright side of things, some players also have reported seeing several new cars in the debug developer version of the game. These cars include the following:

  • Aston DB11
  • Cadillac ATS-V
  • Chevy Vega
  • 1992 Ford Falcon GT
  • VK Commodore Group A
  • 1932 Ford Coupe
  • 2016 Civic Type R
  • Honda S800
  • Jensen Interceptor SP
  • Lamborghini Sesto Elemento
  • Land Rover Series III
  • Lola T70
  • Mercedes 300SEL 6.3
  • Zonda R
  • Renault Alpine GTA LeMans

Did the accidental release of the developer build affect your saved file? Or did you notice any other new cars which were not mentioned above? Let us know what you think by dropping us a comment below!