I would introduce him to a group of Halo-haters and watch as they mercilessly rip him to pieces.
To be honest, I can't help but feel pity for the Master Chief, he's no different to any other generic-fps main character, yet gets ten times more hate than any of them. Halo never tried to be anything other than a generic fps, yet games like Doom and Half Life which do exactly the same thing are treated like they're made out of solid gold.