Tying Up Loose Ends Achievement in Halo: The Master Chief Collection

As one of the most tedious mission-specific achievements in the game, you’ll need to kill every single Elite on this mission before the achievement unlocks. The worst part about this task is that the achievement only unlocks after climbing inside the Covenant Banshee, so there’s no way of knowing if all Elites have been killed prior to finishing the mission.

The good news here is that for the first half of the mission, the Flood and the Covenant are fighting quite frequently, meaning most of the Elites will die by the hand of the parasite. Once you return to the ship via a gravity lift and find the Proto-Gravemind however, all the remaining Elites in the mission – about twenty plus – will be Spec-Op units. As you make your way from your current position to the hanger bay, make sure to inspect every single nook and cranny inside all the hallways. There are three floors total with many hallways so take it slowly and don’t leave any room untouched. Once you’re confident all the Elites in the hanger bay corridors have been killed, climb inside the Banshee and the achievement will unlock.