Tsavo Highway (level)/Walkthrough

Full Contact Safari
This is a relatively short level, so it shouldn't be too much of a challenge, especially on Easy. Walk out of the flaming elevator shaft, and look to your right. There are Battle Rifles and Shotguns on racks. You have full BR ammo, so no need for those. Give a Marine a Shotgun and take his AR ammo for your own. Now, turn around and get into a Warthog. The Troop Transport one, preferably, so you can pick up additional Marines along the way. Wait for 3 Marines to get on, and drive. It won't be long before you see some Covenant attacking a group of Marines. Run over some, and let your Marines mop up. Go up the stairs and you'll find another Shotgun for your Marine, meaning more AR ammo for yourself. Since there is no turret on your Warthog it is important to give your Marines a good arsenal. Get back to the Hog and drive out. Ah, the sunshine. So nice to see it again. Run over the Brute, and maybe some other Covenant. Move on, and you'll find two Jackal Snipers. Wipe them out. By now, you should have more AR ammo than BR ammo, so switch your Battle Rifle for a Beam Rifle. Give one to a Marine, and take the other one for yourself. Drive on. Don't stop to kill the enemies, just keep going. You'll hear Stacker making a distress call, and a Warthog should be destroyed by a Chopper right about...now. Kill the enemies, and turn left to destroy the shield. Go through the cave, and come out.

The Broken Path
Don't be afraid of the Cruiser, it won't hurt you. You will come across some enemies. Use your Beam Rifle to snipe some, and clear the area. Take a Brute's Fuel Rod, and fire 4 shots at the Phantom that just arrived in the turbines (the eyes). Make sure you shoot the same eye. Your Rod won't have too much ammo, so give it to a Marine. Take back your snipe. Kill the Wraith, I like using Warthogs better. You could keep it, if you want. Drive through a small cave, annihilate two Brutes and their Choppers, and kill the next group of Covenant. Get back on the road, destroy the roadblock, snipe some Brutes, and break the shield. You're done.