The Humble Beginnings of Wiljax Brantley
From Halopedia, the Halo wiki
The Humble Beginnings of Wiljax Brantley is an achievement in Halo: The Master Chief Collection. It is unlocked by viewing the World Cuisine advertisement for moa burgers on the campaign level Exodus.
The advertisements can be found in the chapter "The Devil His Due", after the player first encounters civilians but before they take the elevator to Traxus Tower.