Master chief! UFC heavyweight champion Fabricio Werdum to appear in Halo 5: Guardians

It's unfortunate that current Ultimate Fighting Championship (UFC) Heavyweight kingpin Fabricio Werdum failed to capture a sponsorship through the Microsoft-manufactured gaming console Xbox -- just as Flyweight champion Demetrious Johnson once did -- before the promotion's partnership with fitness apparel and lifestyle company Reebok kicked in back in July.

The 38-year-old champion is apparently a huge fan of the first-person shooter and Xbox exclusive Halo (via Bloody Elbow). It was at a Gamescon 2015 event earlier this week where developers of the latest installment in the series revealed that "Vai Cavalo" would make a cameo appearance.

"Fabricio Werdum makes a small cameo appearance in Halo 5: 'Guardians.' He's a big fan of Halo and we're big fans of his, so it's always fun when these kinds of things work out," said a Microsoft spokesperson. "It's a bit of an Easter egg though, so you'll have to really be looking for it."

Microsoft didn't reveal much else on Werdum's character, but it's more than likely a non-playable one, meaning that he won't be available to save the human race anytime soon.

This wouldn't be the first time a UFC fighter had their likeness portrayed in a video game.

Werdum's love for Halo probably doesn't rival veteran Lightweight Cole Miller's fondness of the immensely popular Nintendo franchise, Zelda. The 31-year-old has a son named Link, which is the main character of Zelda.

As far as celebrities and Halo goes, Conan O'Brien has also been featured in the mega-popular franchise. Halo 5: 'Guardians' is set for release on Oct. 27, but you can be sure Werdum won't be one of the millions of fans enjoying it.

The Brazilian recently learned he will be facing former champion Cain Velasquez in a heavyweight title rematch at a date yet to be determined.