New Ways to Save a Buck Achievement in Halo: The Master Chief Collection

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

In New Alexandria, you will be given three primary objectives. In between these objectives, you will receive randomly-generated secondary objectives that usually involve destroying some Shade Turrets or Banshees, protecting a group of Marines from Covenant, or clearing out a rooftop of Covenant forces. One of these randomly-generated objectives, however, will require you to escort Gunnery Sergeant Buck's Falcon across the city. Once you receive this objective (hearing his call for help over the radio), the achievement will unlock.

NOTE: Because these secondary objectives are randomly assigned/generated on each playthrough, you may need to play this mission a few times in order to unlock this achievement.