Mind the Skill Gap Achievement in Halo: The Master Chief Collection

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

After destroying the first anti-air turret, you will eventually need to cross over a bridge toward a massive mining facility. At this time, you will most likely unlock the achievement by simply making your way toward the facility. If, for whatever reason, it doesn't unlock that easily, all you need to do is spot the facility's logo on the yellow-paneled wall as you begin to climb the stairs toward the catwalks infested with Skirmishers and Jackals.