The PC version did not natively support Xbox controllers. Use a program like or JoyToKey to map your controller to keyboard keys (WASD for movement, mouse for aiming).
To understand why the "installation code" is so sought after, we have to look at the state of PC gaming in 2003. freedom fighters game installation code
In recent years, Freedom Fighters saw a digital re-release. This version is optimized to run on modern Windows operating systems (Windows 7, 8, 10, and 11) and, crucially, The DRM is handled by the platform launcher itself. The PC version did not natively support Xbox controllers
The best way to bypass the headache of the "Freedom Fighters installation code" is to purchase the digital version currently available on legitimate platforms. and 11) and