The Humble Beginnings of Wiljax Brantley Achievement in Halo: The Master Chief Collection

This achievement can be earned on the Easy difficulty (or higher) on Exodus.

At the start of the mission, you will naturally pass through a darkened building with several Grunts. After exiting this building, you will find yourself in a courtyard with a few Brutes and additional enemy forces. Clear out the area and, once it's clear and you can freely roam around without any imminent threat, locate the "World Cuisine" kiosk on the left-hand side of the courtyard, just before the door that leads you further into the mission. All you have to do is look at the kiosk's ad for Moa Burgers for a few seconds and the achievement will unlock.