In the context of the Xbox 360 homebrew and modding scene, these file types mean:
It looks like you’ve shared a listing for a of F.E.A.R. 3 (styled as F.3.A.R.) for the Xbox 360 . F.3.A.R. ISO & XEX - Xbox 360 [Region Free]
The executable file format for Xbox 360, often used by those with JTAG/RGH modified consoles to run games directly from a hard drive. In the context of the Xbox 360 homebrew