Ayuda, tengo halo reach en pc y no me dan las placas ni los logros, ya re-instale el juego y no pasa nada 
lo compre en microsoft store
This 343 article can help you fix your problem, if not submit a ticket at Halo Support Site.
The only way I know in the Microsoft Store to verify file integrity is to uninstall and reinstall the game. Following the other steps can help too.
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