Walk It Off Achievement in Halo: The Master Chief Collection

The Pillar of Autumn is without a doubt one of the shortest missions within the entire Campaign. You’ll also come to realize that given the nature of the Autumn’s design structure, it’s also the most confined mission in terms of navigable space for firefights. With that said, you’ll need to proceed through the entire mission very carefully in order to avoid taking any health damage.

On the bright side, overshields will only ever be located inside the Covenant drop pods. This means that so long as you do not purposely step inside an enemy pod and deliberately pick up an overshield, you’ll have no issues obtaining the first achievement. As for not picking up health kits, you’ll want to utilize grenades as often as possible when taking on groups of Covenant enemies inside the Autumn in order to avoid direct confrontations and thus taking health damage. Since the corridors here are tight, a single grenade can usually flush out an entire room or hallway of enemies with ease.

To maximize the effectiveness of grenades on this mission, it would be wise to activate the Bandana skull in the Campaign lobby as this provides unlimited ammo and grenades. Another strategy is to tackle the mission cooperatively with another player. This second method is great since your partner can go forth and clear out all the enemies while you stay behind and avoid any and all crossfire between your partner and the Covenant. Either way, if you complete the mission without picking up a single health kit or overshield, both achievements will unlock after the concluding cutscene.