Forza Horizon 4 isn’t the Australian Horizon game, but it did just get a bunch of Aussie-themed events and some iconic Australian cars.
Right now, you can jump into Forza Horizon 4 and grab the below three cars:
You need to complete the “Holden Your Horses” championship to get the 1988 Holden VL, the “Down Under” championship to get the 2011 HSV GTA and complete 50% of the Spring playlist to unlock the 1996 Holden HSV.
Forza Horizon 4 is available on Xbox Game Pass for PC and Xbox One owners. I’d highly recommend you jump in (not just for these Aussie cars) if you haven’t already.