File: Forza.horizon.3-codex.zip ... Instant

Copy all files from that folder and paste them into the main directory where you installed the game. Confirm "Replace files in the destination" when prompted. 4. Important Prerequisites

If you didn't check the box during setup, open the folder named CODEX inside the mounted ISO. File: Forza.Horizon.3-CODEX.zip ...

Run the game using the desktop shortcut or the forza_x64_release_final.exe in the installation folder. Copy all files from that folder and paste

Forza Horizon 3 often requires Developer Mode to be enabled in Windows. Go to Settings > Update & Security > For developers and toggle "Developer Mode" to On . File: Forza.Horizon.3-CODEX.zip ...

To prevent the game from trying to connect to official servers, it is recommended to block the game's .exe in your Windows Firewall settings . 5. Launching the Game