It looks as though the Forza Motorsport 6 install size has finally been revealed within the Xbox Marketplace. If you go through the various bundles to the standard version it looks like the game will come at an install size of 44.37GB. Seems like it will be a rather large game so the graphics and environments should be beautiful. Forza Motorsport 6 will arrive on September 15 only on Xbox One featuring 1-2 local and 1-24 players online. Finally, you can pre-order the game now with pre-loading being available in the future towards launch.