The game relies heavily on Microsoft Game Services and specific Windows 10 profile-sharing components that have no Linux equivalent.
Forza Horizon 3 is currently on Linux systems , including the Steam Deck. While sequels like Forza Horizon 4 and 5 have been successfully ported to run via Proton on Steam, Forza Horizon 3 remains restricted due to its technical architecture and distribution method. Core Compatibility Issues forza horizon 3 linux
is technically possible but requires advanced knowledge and a secondary graphics card. : Services like Xbox Cloud Gaming or local streaming from a Windows PC via The game relies heavily on Microsoft Game Services