I have completed the main horizon event and championship on the game on the 360 but it does not show on my horizon 2 achievements on this website. Do I need to do it on an Xbox one for my achievements to show up??
The FH2 reward program is for the XB1 version of the game only.
http://forums.forza.net/turn10_postst24273_Forza-Horizon-2-on-Xbox-360.aspx