Uplift Reserve

Start by following the beach path upwards into an open area. Marines will need help flipping a warthog; flip it and get in the driver's seat, ensuring a marine mans the turret. Beware of grunt and brute patrols, brute choppers, and ghosts. A wraith will block the exit path.

Avoid the wraith initially and focus on eliminating covenant infantry. Let your marines handle the choppers and ghosts. Circle around central rock structures to hit infantry while avoiding head-on collisions with vehicles. To destroy the wraith, either let your UNSC teammates attack its weak spot from behind or board it and plant a grenade (risky on higher difficulties). Watch for a second wraith and other vehicles. After destroying the first wraith, proceed along the dirt path. A phantom will drop more enemies and vehicles. Repeat the process for the second wraith. Continue through a tunnel where a free ghost is available.

Enter another open area with a large covenant group and a sniper tower. You can engage them or follow the beach inland. Deal with ghosts, brutes, and banshees. A fortified road with turrets blocks the path. Destroy the turrets and patrols, or boost past them to a shack with ammunition for the Spartan laser, which can destroy vehicles and turrets.

Clear the area, then follow the road left to a dirt path leading up into the rocks.

In this open area, deal with ghosts, choppers, and two wraiths. A central structure is opposite a sniper tower with turrets. Eliminate ground troops and vehicles first. Inside the central structure, find a rocket launcher, Spartan lasers, and a sniper rifle with ammo. Use the elevated balcony for sniping and the heavy weapons for vehicles. Eliminate the wraiths last and proceed across the bridge.

Continue up the dirt path, eliminating covenant forces and turrets at a sniper position. Reach a large covenant staging platform with infantry and another wraith. Clear the area and continue up the mountain, splattering enemies. Stop at covenant barricades, turn left, and head down the path towards the final wraith. Destroying this wraith, if you've destroyed the previous five, earns the 'Wraith Killer' achievement. To complete the mission, either destroy this wraith or drive your vehicle over the cliff in the back right corner of the area facing the city.