Begins with a Single Step Achievement in Halo: The Master Chief Collection

As you start this mission, you will immediately be made aware that this is predominantly a vehicle-emphasized mission, though you will have no problem completing it on foot, especially if you are playing with one or two other players. With that said, avoid grabbing the Warthogs in the hanger bay at the start of this mission and simply wait until the blast door is opened by the Marine. From here, you’ll have to traverse the landscape on foot and pass through a number of valleys containing Sniper Jackals and Brutes of varying ranks. It is highly recommended to grab a Beam Rifle and Fuel Cannon during these initial firefights.

After clearing out the first major blockade and the swarm of Drones, continue down the main road on foot into the next valley filled with Brutes and Grunts. Here, you’ll need to kill the initial wave of enemies before a few waves of appear via Phantoms. There’s plenty of equipment and weaponry around this valley so the following waves of enemies – containing Wraiths and Choppers - shouldn’t be too rough.

As mentioned earlier, this achievement is better suited with cooperative partners as they can utilize the firepower of Covenant vehicles to kill enemy troops while you stay back on foot. All in all, after this long-winded battle, continue on through the mission until your required to climb up to a bridge and proceed down the highway. Be ready to fend off against several more waves of Brutes and Sniper Jackals. Once all the enemies at the end of the highway have been dealt with, destroy the Shield Generator to finish the mission. If you managed to avoid using any vehicles throughout this mission, the achievement will unlock after the concluding cutscene.