Waze now lets you use Master Chief’s voice as your guide - The Verge
According to the Xbox blog post about the promotion, the Halo options are available worldwide, though the Master Chief and Escharum voice directions are only in English, Spanish, French, and Portuguese.The blog also says the content will only be in Waze for a limited time, so if you’re looking to try Halo-themed driving, it’s probably best to try it out soon.
It’s worth noting that googling or Twitter searching Halo could be a bit risky at the moment if you don’t want the upcoming Halo Infinite to be spoiled — tons of info about the game’s plot leaked onto the internet after being accidentally included in the game files for the multiplayer technical preview that ran from July 29th to August 2nd