Halo 3 won't start, unknown file error?

Discus and support Halo 3 won't start, unknown file error? in XBoX on Windows to solve the problem; It almost boots up when I run it, but as soon as it reaches the initial load screen it shuts down and shows this message: [img] I never purchased... Discussion in 'XBoX on Windows' started by nononononononononono_no, Jul 16, 2020.

It almost boots up when I run it, but as soon as it reaches the initial load screen it shuts down and shows this message:

I never purchased Halo 1, only Halo 3? I did a flight for Halo 3 as well and it worked great, I am unsure why the actual game will not work. I have tried verifying the game files through steam and uninstalling/reinstalling, nothing works.

:)

nononononononononono_no, Jul 16, 2020