"Full Contact Safari"
Objective: Lead marines away from the base
It's time for you to lead the survivors out of the base and to safety. Take the hallway to the left of the burning path and get into the Warthog with a turret, while the marines will get into other Warthog.
Drive along the path marked by red flares until you come to a small outpost where marines are fighting Jackals. Kill the Jackals and let the two marines load into the troop transport before you move out.
Follow the path and kill any enemies you come across. The path will fork around the little hills, but it'll come back to the same point, so you won't get lost. Once you reach the downed Phantom, kill the enemies and take the path on the right.
You'll pass through a short ravine into a small valley. Here, you'll fight troops dropped off by a Phantom, enemies in hovering towers, and a turret on a hill. Neutralize the turret first -- the biggest threat in the valley -- and then drive around the perimeter eliminating the remaining ground forces
Next, drive up and over the dam, and follow the dried river bed. Eventually it will lead you to a human installation overrun with Covenant forces, where you'll fight enemies on foot and on Brute Choppers.
Kill all the forces around the installation, commandeer a Brute Chopper -- allowing your troops to take over the Warthog you were in -- and head to the large purple shield just past the installation. The shield is guarded by Brutes and Drones; kill them and then use a grenade on the shield's generator, allowing your vehicles to continue on their way.
Follow the path, preferably while operating a Brute Chopper, and you'll come to a highway. If you have enough speed, you'll not only make the first jump, but also the second jump. The marines in the Warthog will disembark and go on foot, which prompts the new chapter of the level and a new objective.
"The Broken Path"
Objective: Get to the town of Voi
Take the remaining marines and, in your Brute Chopper, head forward until you come to a group of marines fighting the Covenant. Kill the remaining forces in the buildings, prompting a message from your HQ about fighting the incoming enemy until Pelicans arrive with support. Head into the buildings on the opposite side of the Covenant floating tower, where you'll find a turret as well as three Trip Mines. Take the Trip Mines and lay them in the road or along the choke points to the turret, and prepare for the incoming enemy.
A Phantom dropship shows up, so man the turret and kill the enemy as they jump out. If you can manage to pick up a fuel rod cannon, you can take out the Phantoms with a few well-placed shots before they finish dropping off the enemies. On legendary, you will have to face two waves of Phantom drops, the second of which has twelve (12!!!) brutes. Next, disconnect the turret from its mount and move towards the Wraith, shooting the gunner. Then board the Wraith and melee it until the driver flops out. Get in and continue down the road. (If you destroy the Wraith, use the Warthog that the Pelican drops instead.)
Continue down the path, clearing out the enemy towers and Choppers, then enter the tunnel ahead of you. When you come out of the tunnel, you will see two Brutes standing next to their Choppers. If you are quick enough, you can blow them up before they can reach their vehicles. Eliminate them and then head to your left, continuing along the broken highway.
As you come down the ramp from the broken section of highway, you will be attacked by three Brute Choppers, a turret, and two Wraiths. Take the path on the right of where you came down the ramp, and kill the turret on your upper left. Next, kill the three Brute Choppers or let your marines in the Warthog kill them, then move to the Wraith dead ahead. Now all that should be left is the final Wraith.
Drive up the hill and kill the final enemy Wraith, and proceed up the highway.
You will encounter an enemy road blockade that, unless you have a Wraith, will force you to dismount and fight in a close firefight with several Brutes. Fight your way through the barricade, by using the sheer forces of a Wraith or by brutal ground fighting.
Unless you've captured a Wraith, this next part is going to be tough. You'll spot a downed Pelican and a large energy shield blocking your way to Voi. You will have to fight several Brute Elites and a turret, so use the Wraith on them, thus ending the level.
