Part 1: One Last Shot
During the first 4-5 minutes of this mission, you will be flying a fighter ship through the area. I’m not going to give you a blow by blow, but the essentials are to avoid the various moving walls and turret fire as you go. Note that you can destroy the turrets along the way. You are also able to lower the red shields - when you see one, shoot the circular red power core in the center to disable the shield. After around 5 minutes of maneuvering through the various obstacles, you will fly out into an open area.
Part 2: From the Crade…
You will exit into a large outdoor area. In the center is a circular structure. Around the edges of the area are four structures, you’ll see an orange laser shooting out from the top of them. Each of these structures has an entrance to either side of it with an orange power generator inside. We need to fly around the outside of the area, avoiding or destroying the turrets and each of the generators as you go. Once all four have been destroyed a scene will play.
Part 3: …To the Grave
When we are back on our feet, continue through the door in front and enter the main room. Destroy all of the watchers and any laser emplacements they put down in the area. Continue through the door to the left. There are two knights in here.
Head up the ramp and across the platform, killing crawlers as you go. When they are dead another portal will appear so head on through. We’ll be on a larger platform. Kill the four knights and the watchers here. Once it’s clear to do so, make your way over to the portal marked with the objective marker. In the next room, you will find four glowing pits on the ground with weapons hovering above them. Note the gravity hammer here.
Note: If you grab the gravity hammer, you can earn an achievement 'Chief, Smash!' for killing three crawlers with a single hammer swing.
Continue into the portal on the other side of the room. Walk down the ramp and you’ll see a knight in front who will warp away. Explore the platform and make your way across to the right. Eliminate the four knights and the crawlers wandering around as you proceed and then enter the portal at the end.
Continue along the bridge until you reach the main platform. Eliminate the knight, watchers and the crawlers around the area. Once it is all clear, stick Cortana into the pedestal in front. You will notice that there are two bridges leading to this platform. We will have to defend the area against a large number of crawlers.
Defend the platform for a couple of minutes and when everything is good to go grab Cortana out of the socket and continue across the opposite bridge from where we entered and into the portal on the far side of the platform killing any crawlers that get in your way. Go through the door and step into the gravity lift to ascend to the next area.
Part 4: Old Friends
Run up the ramp and step on the Launchpad on the floor. When you reach the platform on the far side of the jump, climb the ramp and enter the door. Loot the weapon racks here if you wish and then go out the next door. Drop down to the platform below. Insert Cortana into the pedestal.
Afterwards, you will see two objective markers that appear on either side of the area. Let’s go down the ramp to the left first and hit the launch pad to hop across to the next platform.
Kill the knight in front, and then head down the ramp to the right. Kill the knight and any crawlers that attack here and climb the ramp to your left. Kill any crawlers at the top. Turn left and kill the knights here before proceeding up the ramp to the objective marker and activate the light bridge.
Continue across the bridge and eliminate the pair of knights on the other side. Proceed to the right and kill the crawlers here and the pair of knights at the end of the path. When clear, insert Cortana into the pedestal. Drop down off the platform to the left and run onto the jump pad here.
Once on the next platform, deal with the knight on the platform in front and to the left and any crawlers in the immediate area before heading up the ramp at the back of the room. On the next platform, kill the crawlers and watchers here. Drop down to the platform below on the left, kill the two knights here and then make your way over to the jump pad to reach the next platform.
After the scene, drop down off the platform to the left and run onto the jump pad here. As you land on the next platform, four knights will teleport in to attack you. Defeat them all, stand on the glowing blue circle on the ground on the central platform. It’s a gravity lift! Ride it to the top and proceed along the light bridge. During the scene, follow the in-screen button prompts to complete the mission and the game!
Congratulations, you have finished Halo 4!