How Pedestrian Achievement in Halo: The Master Chief Collection

This mission will prove to be extremely tedious without using the Warthog provided after the first major firefight with Marine allies. Fortunately, the vehicle’s firepower isn’t necessary and it’s not even that useful for the later firefights, so traveling on foot shouldn’t be too bad.

The only difficult aspect of this achievement is the large gap inside the first tunnel of the cave-like structure. The way to cross this massive gap without the usage of a vehicle is to utilize a grenade jump. As such, you’ll need a frag grenade or plasma grenade at this point in order to advance through the mission. When you reach this gap, simply toss the grenade on the ledge, take a few steps back, and then time your forward jump so that the grenade explodes as you leave the ground, thus propelling your forward over to the other ramp.

If you’re playing cooperatively, only one person has to perform the grenade jump. The second player can be killed via friendly fire, which results in their spawn on the opposite side of the gap. Overall, once your rescue all three groups of Marines and are picked up via Pelican, the achievement will unlock after the concluding cutscene.