Halo (Halo 3 level)

Halo is the tenth and final Campaign mission of Halo 3.

Upon completing it on Normal or higher, the player unlocks the Return achievement. If the player gets 15,000 points or more in the meta game, they will unlock the Reclaimer achievement. This level is also the second level in the Halo series to bear the name of another level, following the second level of the first game.

Summary
In this level, John-117, Thel 'Vadam and Sergeant Johnson make their way towards the Control Room in order to activate the ring using the Index from the first Halo encountered. However, the Gravemind sends Flood combat forms (and later pure forms), carried by Flood dispersal pods, to try to stop them. After holding outside the Control Room for a while, 343 Guilty Spark opens the door and they reach the Control Room. When Spark realizes that they are going to activate the unfinished Halo, which will destroy the Ark and the new installation, he fatally injures Johnson, who was activating the ring. The monitor then locks the Arbiter out of the Control Room and corners John-117. Just as Spark is about to kill the Spartan-II, Johnson, barely alive, fires his Spartan Laser and damages the monitor. He then hands the weapon to John-117 and faints. The Chief, after firing 3 shots at the monitor, finally kills the rampant AI unit. He then says farewell to Johnson who dies from his injuries, and activates the ring with Cortana. Outside the Control Room, the Chief and the Arbiter battle their way to Johnson's Warthog, and race their way to the UNSC Forward Unto Dawn. After entering the frigate, the Arbiter heads to the bridge while the Chief uploads Cortana to a Holotank, who proceeds to fire up the frigate's engines. The Chief, stuck in the cargo bay as they enter the portal, relaxes as Halo fires, cutting the ship in half.

In March 2553, Lord Hood delivers a speech commemorating the fallen combatants of the battle, and reveals that the Chief, with Cortana in his helmet, did not return to Earth with the front half of the Dawn. He then shakes hands with the Arbiter, the only Sangheili present at the memorial. 'Vadam then leaves for Sanghelios with Rtas 'Vadum, on board the Shadow of Intent. Post-credits scene shows the Chief in the second half of the Dawn, uploading Cortana to another holotank while he goes into cryosleep to await rescue. On Legendary difficulty, the second half of the Dawn is shown drifting towards an unknown planet.

Transcript


{Cutscene}

''Fades in to the Pelican John-117, Thel 'Vadam and Cortana are on board and heading towards Installation 04B. The Assault Carrier Shadow of Intent  flies slowly under the megastructure. Cuts to the cockpit of the Pelican.''


 * Shipmaster Rtas 'Vadum (COM): "We are aboard, Humans...and Elites. Will you not come with us, brother?"


 * Arbiter Thel 'Vadam: "No. This is our fight. And I will see it finished."

The Pelican nears the Halo ring.


 * Cortana: "Johnson? Do you have the Frigate?"


 * Sergeant Major Avery Junior Johnson (Video COM): "Yes, ma'am. I'll land her as close to the control room as I can."


 * Cortana: "Safe is better than close, Sergeant Major."


 * Johnson (Video COM): "Roger that. And ma'am? It's good to have you back."

''The Pelican arrives at Halo. The rear port engine is too damaged for a normal landing. The Master Chief makes a crash landing in a snowy canyon near the Control Room. The Chief and the Arbiter clamber out. From behind the cliffs approaches the Forward Unto Dawn.''


 * Cortana: "Halo. It's so new... Unfinished. I'm not exactly sure what will happen when we fire it..."

The Arbiter tosses the Chief an MA5C Assault Rifle.


 * Master Chief Petty Officer John-117: "We'll head for the Portal. And we'll all go home."

{Gameplay}

Full Circle
Assault on the Control Room.

The Chief and the Arbiter prepare to head for the control room, making sure that they stock up on enough supplies from their crashed Pelican.


 * Cortana: "Head through the cliffs."

The Chief and the Arbiter head through the icy caves.

If the Chief stalls:


 * Cortana: "The Control Room isn't far!"

If the Chief heads for the Terminal instead:


 * Cortana: "Where are you going?"

When the Chief reaches the Terminal:


 * Cortana: "Wait, what's that?"

After accessing the Terminal.


 * Cortana: "How many of these have you found?"

If the Chief re-accesses the Terminal, or takes too long reading it:


 * Cortana: "Come on, Chief, let's get back on track. The Control Room is outside!"

''The Chief and the Arbiter arrive at the foot of the pyramid-like Control Room structure. Suddenly, Flood Dispersal Pods begin to drop in.''


 * Gravemind: (angrily) "Did you think me defeated?"


 * Cortana: "Flood Dispersal Pods! Control Room's at the top of that tower, Chief, go!"

''The Chief and the Arbiter fight their way through numerous combat forms, and head for a ramp on the right side of the tower. More Flood drop in on them, but Sentinels appear and provide cover fire.''

If the Chief reaches the end of the wrong side of the tower.


 * Cortana: "There should be ramps that lead to the top - check the other side!"

The Arbiter and the Master Chief push their way up the tower, but the Flood continues to attack with overwhelming force.

Johnson appears on the cliff with a Spartan Laser, shooting down Flood forms.


 * Johnson (COM): "I got you covered, Chief. Meet you at the top of that tower."

If the Chief heads back the other way:


 * Johnson (COM): "Careful, I can't cover you on the far side."

The Chief and the Arbiter continue upward.


 * Johnson (COM): "Keep moving, Chief. I've got your back."

''The Master Chief and the Arbiter get closer to the top. Johnson continues to fire from the cliff.''


 * Johnson (COM): "Flood are crawling all over that tower; watch yourself."

''The Chief and the Arbiter reach the top floor. Johnson provides cover fire for them as numerous Flood forms continue assaulting the tower.''


 * Johnson (COM): "Spark? You in there? Open the damn door!"


 * 343 Guilty Spark (COM): "Of course, Reclaimer. Just as soon as you dispose of all proximate Flood threats. I'm afraid containment protocols do not allow me to-"


 * Johnson (COM): "Yeah, yeah, I hear you!"


 * Cortana: "Was that the Monitor? You didn't tell me he was here. Well, we are finally doing what he wanted."

The Flood continues to stubbornly attack with overwhelming force.


 * Gravemind: "I have beaten fleets of thousands! Consumed a galaxy of flesh and mind and bone!"

''John-117, Thel 'Vadam, Sergeant Johnson, and any surviving Sentinels fight off wave after wave of Flood. Finally the tower is secured. Johnson comes down from the cliff and joins the Chief and the Arbiter.''


 * Johnson: "Open up! Coast is clear."


 * Cortana (COM): "Not for long. I'm tracking additional dispersal pods. They'll be hitting any minute!"

The doors to the tower open.


 * Johnson: "Chief, Arbiter! Let's move!"

''The trio enters the tower. They move down a corridor, turn the corner, and arrive at a set of blast doors.''


 * Gravemind (Gravemind Moment): "Do I take life or give it? Who is victim, and who is foe?"


 * Cortana: "It's trying to rebuild itself on this ring!"


 * Johnson: "Hurry! Control Room's close!"

The trio heads through another set of blast doors and finally reaches the Control Room.

{Cutscene}

''The Control Room doors open up. The Chief, the Arbiter and Johnson cautiously enter. Hearing the shrieks and growls of the approaching Flood, they turn around, weapons drawn. The second set of blast doors closes, sealing the Flood out. The Arbiter stands guard at the doorway while the Chief and Johnson prepare to activate the Installation.''


 * Cortana: "Yank me, Chief."

The Chief removes Cortana's data chip from his helmet.


 * Johnson: "I'm not gonna lose her too."

''The Chief tosses the data chip to Johnson, who heads for the control panel. A rotating holographic image of the incomplete Halo ring hovers at the center of the chamber.''

343 Guilty Spark appears from above and accompanies Johnson.


 * 343 Guilty Spark: (humming to himself) "Oh, hello! Wonderful news - the Installation is almost complete!"


 * Johnson: (uninterested) "Terrific."


 * 343 Guilty Spark: "Yes...isn't it? (Short but uneasy silence) I have begun my simulations. No promises, but initial results indicate this facility should be ready to fire...in just a few more days!"


 * Johnson: (impatiently) "We don't have a few more days!" (gets ready to activate the Installation)


 * 343 Guilty Spark: (shocked, alarmed) "Bu-bu-but a premature firing will destroy the Ark!"


 * Johnson: (dismissively) "Deal with it."


 * 343 Guilty Spark: (quietly, to himself) "...will destroy this Installation."

Spark's "eye" suddenly turns red and blasts Johnson with his energy beam.


 * Johnson: (screams) "Aaaah!!"


 * 343 Guilty Spark: "Unacceptable! Unacceptable! Absolutely unacceptable!"

''The Chief rushes to Johnson's aid. 343 Guilty Spark shoots at the Chief, who is flung backwards from the force of the blast and onto the floor. His Energy Shields drop and attempt to recharge.''


 * 343 Guilty Spark: (in hysterics) "Protocol dictates action! I see now that helping you was wrong!"

''The Arbiter, hearing the commotion, moves forward, and 343 Guilty Spark blasts him as well, knocking him out of the Control Room. (In single-player, the doors close, sealing the Arbiter out of the room). The Chief tries to get back up, and Spark blasts him again, knocking him to his knees. With no shields protecting him this time, his armor starts to smoke.''


 * 343 Guilty Spark: (his eye turns back to blue) "You are the child of my makers. Inheritor of all they left behind. You are Forerunner! But this ring... (his eye turns red again)...is mine."

{Gameplay}


 * 343 Guilty Spark: "I take no pleasure in doing what must be done."

''The Chief fires whatever weapons he has at the rampant 343 Guilty Spark with no effect whatsoever. Spark counters with his powerful laser blasts and a repulsion field that forces the Chief backwards.''


 * 343 Guilty Spark: "You do not deserve this ring!"

343 Guilty Spark corners the Master Chief.


 * 343 Guilty Spark: "I have kept it safe. It belongs to me!"

Unnoticed by 343 Guilty Spark, Johnson manages to sit halfway up and shoulder the Spartan Laser.


 * Johnson: "Not for long!"

''Johnson shoots 343 Guilty Spark with his Spartan Laser. Caught off-guard, 343 Guilty Spark is blasted away from the Chief, falling to the ground and becoming inert.''

The Chief rushes up to Johnson.


 * Johnson: (weakly) "Kick his ass."

''Johnson passes out. The Chief takes his Spartan Laser to destroy Guilty Spark.''

''343 Guilty Spark rises from the floor, flying at a slightly tilted angle, his metal body visibly damaged. At this point, 343 Guilty Spark will say four sentences at random.''


 * 343 Guilty Spark: "You - you cracked my casing!"


 * 343 Guilty Spark: "Damage! Damage! That hurt, Reclaimer!"


 * 343 Guilty Spark: "My eye! Do you mean to blind me!?"


 * 343 Guilty Spark: "Stop now, before one of us gets hurt!"

''After making the first shot, Spark begins to fly at a more tilted angle, leaking blue plasma from his sides and he begins to spark. Again, the following sentences are stated in random order.''


 * 343 Guilty Spark: (voice breaks, then readjusts itself) "-destroy your inheritance!"


 * 343 Guilty Spark: "Accept your le-gacy!"


 * 343 Guilty Spark: "Think of you-ou-ou-our forefathers!"

''Following the second shot, Spark's casing becomes distorted, with pieces of him sheared off completely. More plasma leaks from his sides and the sparks happen more ferociously. The right side of his 'eye' has broken off. Once again, the following sentences are said in a random order.''


 * 343 Guilty Spark: (Makes a garbled humming sound)


 * 343 Guilty Spark: (high, crackling voice) "M-m-my pr-precious!"


 * 343 Guilty Spark: (deteriorating, breaking voice) "I a-a-a-am the Monitor of Installation Z-Zero F-Four!"

After making the finishing shot.


 * 343 Guilty Spark: "Oh myyyyyyyyyy-aaahh!"

343 Guilty Spark explodes in a flash of blue and white light.

{Cutscene}

The Master Chief bends over Sergeant Johnson, who is still alive - barely.


 * John-117: "I'm getting you out of here."


 * Johnson: "No... No, you're not."

Johnson grabs the Chief's hand with Cortana's chip in his.


 * Johnson: "Don't - don't let her go. Don't...ever let her go. (Coughs) Send me out...with a bang."

''Johnson succumbs to his wounds. The Chief takes Cortana from him and lets go of his hand. He stands up, and wordlessly releases Cortana into Halo's core, gripping the data chip tightly.''


 * Cortana: (Looks sadly at Johnson's body) "Chief... I'm so sorry."



''The Master Chief says nothing. He shakes the chip with his hand but quickly stops. Cortana bows her head, eyes closed, and makes a gesture, activating Halo. She uploads herself back into her chip.''

''The Chief places her chip in the back of his helmet, and then turns around. Behind him, the control console lights up and throbs with power. A massive column of energy erupts from the Core, and the whole Control Room starts to shake violently. A support beam falls from the ceiling and crashes into the platform. Johnson's body slides off the platform as it tilts to one side and begins to fall. The Master Chief runs for the door, which has opened again. The Arbiter can now be seen waiting for the Chief.''

{Gameplay}

The Way the World Ends
Pedal to the Metal.




 * Thel 'Vadam: "I am sorry, Spartan. But come."

(With IWHBYD skull on.)


 * Thel 'Vadam: "Well, that sucks. But come."

Pieces of the walls around them suddenly explode; the Master Chief and the Arbiter run for the doorway leading outside, fighting a small group of Flood along the way.

The Master Chief and the Arbiter make it back outside, revealing a piece of collapsed ice forming a slope upwards.


 * Thel 'Vadam: "Even in death, your Sergeant guides us on."


 * Cortana: "The Dawn... Of course - the Frigate! We still have a chance!"


 * Cortana: "Find the doorway in the cliffs, Chief. The Dawn is on the other side."

If the Chief takes too long to get to the doorway.


 * Cortana: "See that doorway further on? Get to it."

The Chief and the Arbiter head along the cliff, encountering Flood and Sentinels, who have followed 343 Guilty Spark's lead and turned against them too.

They make it inside and find themselves in the middle of a battle between the Flood and a group of Sentinels.


 * Gravemind: "Resignation is my virtue. Like water I ebb and flow. Defeat is simply the addition of time to a sentence I never deserved... But you imposed."

The Chief and the Arbiter fight their way through a horde of infection forms and carrier forms.


 * Cortana: "Don't let this ring be the end of us, Chief."

They make it back outside where they find a Warthog waiting for them.


 * Cortana: "There! Johnson's Warthog."

''The Chief takes the wheel. The Arbiter takes the turret. (3-4 player co-op: Two Warthogs are present, both facing opposite directions.)''


 * Cortana: "Come on, Spartan - go, go, go!"

''The Chief floors it. As they reach an open area, a massive explosion erupts alongside them.''


 * Cortana: "Drive, Chief. Head for the Frigate."




 * Cortana: "Come on! Faster!"

The Chief and the Arbiter reach a massive open structure.


 * Cortana: "The Dawn is close. We can make it! As long as the ground doesn't fall underneath us..."

The Warthog soon enters inside the interior of a large hallway with ramps.


 * Cortana: "The charging sequence...it's too much for the ring to take!"

They soon reach another open structure where battles between the Flood and Sentinels continue.


 * Cortana: "Halo is ripping itself apart!"

They come upon a large open stretch.


 * Cortana: "Hurry, Chief! Don't stop!"


 * Cortana: "Charging sequence at 30%..."

They reach one more open structure, this time a few Flood pure forms await them.


 * Cortana: "50%, Chief!"

They reach another hallway with ramps, where a larger battle between Sentinels and the Flood rages on.


 * Cortana: "70%!"

The Warthog makes it out of the hallway battle, to an area where the Frigate can be seen from a distance.




 * Cortana: "80% charged!"

''They head for the final bend, encountering more Sentinels. In the distance, a small group of Flood can be seen falling off a collapsing section of platform.''


 * Cortana: (desperately) "90% - firing sequence initiated!"

If the Chief heads to an Easter Egg, they meet one last Covenant soldier.


 * Final Grunt: "Hey, Demon! The jerk store called, and they're all out of you! Poor you, stolen at the age of six and conscripted into the military, waaaaagh...! Okay look, if you let me live, I got the Fist of Rukt. Look, I'll be the bottom! I'll polish your boots. I'll polish your helmet! It's the gas, ha-ha! When I'm on the gas, I don't know what I'm doing half the time!"

The Chief and the Arbiter make it to the final straight stretch to the Forward Unto Dawn, but there's a 70m (230ft) gap of thin air between the open cargo bay and the edge of the structure.


 * Cortana: "Gun it, Chief! Jump! Floor it! Right into the hangar!"

{Cutscene}

''The Warthog makes the jump, but doesn't land well, tumbling and rolling as it crashes into the Frigate's hangar. The Master Chief and the Arbiter recover, then the Dawn shifts. A Scorpion Tank begins sliding towards the Arbiter, who takes cover behind a pile of crates. The tank plows into it. The Chief leaps over the Warthog and hesitates, seeing the Arbiter digging himself out of the crates. The Chief nods at him, and the Arbiter nods back. The Arbiter rushes to the bridge while the Chief runs to the hangar control terminal and plugs Cortana in to take control of the Frigate. Her avatar appears from a Holotank next to the terminal.''


 * Cortana: "Hang on!"

Cortana ignites the thrusters at full burn and launches the Dawn'' at full speed. The Chief grabs onto the terminal, hanging on for dear life as the Dawn leaves Halo's atmosphere. As the Chief tries to stay anchored, the Warthog flies out, striking the Chief on its way through the open hangar doors and out into empty space. The Chief flies off the panel, then glides down the floor towards the doors, with a self-destructing Halo looming beneath. The Chief punches his fist hard into the floor to get a grip, halting near the back end of the hangar. Cortana reaches out her arm towards him, scared of losing him.''


 * Cortana: "Chief!"

''The Scorpion flies out towards the Chief. He ducks his head just in time as it flies over him, narrowly missing the Chief but smashing the floor behind him and falling back towards Halo. The Chief begins to climb back up to Cortana, finally making it to the Holotank. Meanwhile, the Arbiter makes it to the bridge and sits down at the controls. The Chief braces behind the panel, plugging Cortana back into his helmet.''


 * Cortana: "If we don't make it..."


 * John-117: (Determined) "We'll make it."


 * Cortana: "It's been an honor serving with you, John."

''The Chief finally rests his head back, exhausted. Halo suddenly explodes, engulfing the hangar in a blinding white light. All goes blank.''

Level ends

Eulogy
{Finale}



''On a hillside near the Portal at Voi, which has now been shut down, Marines gather. Fleet Admiral Lord Terrence Hood removes his hat, and begins his speech.''


 * Lord Hood: "For us, the storm has passed. The war is over. But let us never forget those who journeyed into the howling dark and did not return. For their decision required courage beyond measure..."

Flashback: The front half of the Forward Unto Dawn'' enters the Earth's atmosphere, and crashes into the Indian Ocean. Two marines track its descent.''


 * Lord Hood (voiceover): "...sacrifice, and unshakable conviction that their fight, our fight, was elsewhere."

Flashback continued: An engineering crew cuts into the Dawn'' with torches, while a rescue Pelican hovers overhead. The Arbiter emerges from the wreckage.''

''Flashback ends: The Arbiter is revealed to be present at the memorial, standing solemnly with the Marines. The Shadow of Intent can be seen hovering above in the distance.''


 * Lord Hood: "As we start to rebuild, this hillside will remain barren. A memorial to heroes fallen. They ennobled all of us, and they shall not be forgotten."

''Admiral Hood puts his hat back on, and salutes. Sergeant Stacker turns to the other Marines present.''


 * Gunnery Sergeant Marcus Stacker: "Present arms!"

''Seven Marines raise their Battle Rifles and each fire a single burst of three shots: a 3-volley salute. The view pans over the Ark Portal, now closed and silent, and Mt. Kilimanjaro against the evening sky.''

Later, the Arbiter approaches Lord Hood, standing alone in front of the Memorial, which appears to be a Pelican wing, decorated with pictures of the fallen, including Commander Miranda Keyes and Sergeant Major Avery Johnson, along with flowers, medals, ribbons, and other tokens of respect.



Under the UNSC emblem is an inscription commemorating the dead:

IN MEMORY OF THOSE FALLEN

IN THE DEFENSE OF EARTH

AND HER COLONIES

MARCH 3, 2553

Lord Hood and the Arbiter stare at the Memorial.


 * Lord Hood: "I remember how this war started. What your kind did to mine. I can't forgive you. But..."

Hood turns to the Arbiter and holds out his hand.


 * Lord Hood: "You have my thanks. For standing by him to the end."

''The Arbiter slowly shakes Admiral Hood's hand. After letting go, Hood's eyes are drawn to one part of the memorial in particular.''


 * Lord Hood: "Hard to believe he's dead."

The Arbiter looks away, toward the Shadow of Intent, hovering silently in the sky.


 * Thel 'Vadam: (quietly) "Were it so easy."



''The Arbiter leaves the Memorial. His Phantom heads back to the Shadow of Intent, hovering in about the same position the Portal to The Ark once was. The Arbiter meets Shipmaster Rtas 'Vadum on the bridge. 'Vadum is looking at a holographic image of Earth.''


 * Rtas 'Vadum: "Things look different. Without the Prophets' lies clouding my vision. I would like to see our own world - to know that it is safe."

The Arbiter reassuringly places a hand on 'Vadum's shoulder.


 * Thel 'Vadam: "Fear not. For we have made it so."

The Arbiter clenches his fist to his chest.


 * Rtas 'Vadum: "By your word, Arbiter." (clenches his fist to his chest likewise to Thel 'Vadam.)

The Arbiter takes a seat on the command chair, the one normally used by Rtas 'Vadum.


 * Thel 'Vadam: "Take us home."

The Shadow of Intent leaves Earth.

Going back to the Voi Memorial, the view shows that next to the print "March 3, 2553", the number "117" is carved into the metal of the wing, and the rank of Master Chief Petty Officer of the Navy is taped to the upper right of it as a tribute to the Master Chief.

''Fade to black. Credits roll.''

Epilogue
{Epilogue}


 * Cortana: "Chief? Can you hear me?"

The Master Chief, very much alive, awakens, floating in zero gravity in a debris-filled hallway on board the Dawn.


 * Cortana: (relieved) "I thought I'd lost you, too."

''The Master Chief looks at a gaping hole in the hallway. He drifts to his floating Assault Rifle, and holsters it, then begins to drift to the end of the hallway.''




 * John-117: "What happened?"


 * Cortana: "I'm not sure. When Halo fired, it shook itself to pieces. Did a number on the Ark. The Portal couldn't sustain itself. We made it through just as it collapsed."

''The Chief reaches the end of the hallway, which opens up into empty space. The Forward Unto Dawn is revealed to be sheared in half, floating in a cloud of its own debris, still red-hot from the sudden Slipspace slowdown.''


 * Cortana: "Well... some of us made it."

The Dawn ' s remaining half continues to drift aimlessly in unknown space.

The Chief begins to drift further inside the ship, finding a row of cryotubes, complete with a Holotank to plug Cortana into.


 * Cortana: "But you did it. Truth and the Covenant, the Flood..."

The Chief plugs Cortana's data chip into the Holotank and she appears.


 * Cortana: "It's finished."

The Master Chief turns off the flashlight on his helmet.


 * John-117: "It's finished."

The Chief places his assault rifle in one of the rackets on the wall.


 * Cortana: "I'll drop a beacon, but it'll be a while before anyone finds us."

The Chief climbs into one of the cryotubes.


 * Cortana: "Years, even."

The cryotube door begins to close.


 * Cortana: "I'll miss you."




 * John-117: "Wake me. When you need me."

''Cortana smiles, nodding. The cryotube closes and seals, freezing the Master Chief and bringing the Halo Trilogy to its conclusion.''

Fade to black

{Legendary-only Scene}

The back half of the Forward Unto Dawn'' is seen drifting towards a planet. A star is eclipsed by the Dawn for a second as it slowly comes out from behind the planet, casting light upon it momentarily before blinding the view completely.''

Game ends

Glitches

 * When the Flood first start to arrive in the Dispersal Pods, do not attack any of them. Exit the cave area and take a right hugging the wall for a second. After a rock and a bit of structure one will be able to climb the hill and back up to the cliff face near the terminal entrance. Enter the small building and hang around the terminal for a minute, then exit and jump back down the cliff like one would normally. More Dispersal Pods will land, doubling all Flood encounters. It seems to be a AI Respawn Glitch. Its effects stop after Johnson dies and only for the Flood. Numbers change with difficulty.
 * It is possible to kill Johnson and grab an infinite ammo Spartan Laser. The player must kill him the first time and take his low-ammo laser, switching it for a weapon Johnson can't pick up. He will stand up again with another Spartan Laser, and killing him again will allow this player to obtain it. This is handy to leave outside the control room door, because it is very effective against Sentinels and Flood alike. However, after killing Johnson multiple times (betrayal amount depends on the difficulty), the player will be marked as a traitor and Johnson will try to kill him/her.
 * If one kills Johnson before entering the Control Room, after killing 343 Guilty Spark, when the door opens, one can see Johnson on the floor wounded and a Flood Infection Form will convert him into a Combat Form. If the Infection forms are killed before they do so, he will get up and fight with the player, though he won't leave the building (since he's supposed to be dead, he has no scripted path to follow); if one tries pushing him out the door he will automatically run back. Still, if one somehow manages to push him until the Warthog, he will come within the Hog, but during the ending cutscene Johnson is not in the Warthog for obvious reasons.
 * If the player deploys an Auto-Turret after the Gravemind moment, the Auto-Turret will become an enemy. If the player deploys it facing the blast door, the one before fighting 343 Guilty Spark, and get killed while simultaneously triggering the cutscene, one will see two Master Chiefs, one dead and one alive. If the player does this on Co-op, after the cutscene, the Master Chief player will be unable to fight and Guilty Spark will target the Arbiter instead. Also, the Auto-Turret is capable of taking down the Arbiter's shield in the cutscene and will occasionally attack the Arbiter, Johnson, and/or Master Chief in the cutscene.
 * If one uses the aforementioned glitch for the infinite ammo Spartan Laser, one can kill the Arbiter and make him pick it up. If one does this near the end before getting on a vehicle, the Arbiter will pick it up and run towards the the Control Room. He will stand there and not get in the Warthog or Mongoose.

Mistakes

 * At the beginning of the level, Thel 'Vadam passes an Assault Rifle to the Chief in the cutscene. However, if the player got to this level by completing the level Cortana right before, the player will start with whatever weapon he/she took from that level, if they have the Cortana Skull, they will spawn with a Spartan Laser and if they didn't play the previous level, they have a rocket launcher and shotgun.
 * In gameplay, the Arbiter's primary weapon is a Plasma Rifle and an Energy Sword as the secondary. During the cutscene in the Control Room, he is oddly shown wielding a Covenant Carbine.

Easter Eggs

 * There is a Talking Grunt on this level. He tries to make fun of the Master Chief's childhood by mocking how he was kidnapped and forced into the SPARTAN-II program. This is also a reference to other Talking Grunts, who appeared in past Halo games.

Production notes

 * The part where the player first sees the Control Room ziggurat originally featured a cutscene with the Forward Unto Dawn flying overhead, revealing Sergeant Johnson's intention to accompany John-117 and Thel 'Vadam into the Control Room; in this version, Cortana was under the impression that Johnson was supposed to have returned to the portal with the Shadow of Intent until this point.

Miscellaneous

 * This is the third level to contain the Flamethrower.
 * Oddly, even though High Charity is destroyed and there are no Flood controlled ships in system, Flood Dispersal Pods somehow fall from the sky. It is possible that they came from the location where Gravemind is rebuilding himself on the ring.
 * If one heads over to the large crevasse next to the Control Room in the beginning of the level, one can look down and see an almost endless series of catwalks. One can only explore the crevasse in theater mode. In addition, after destroying 343 Guilty Spark, if one rechecks the crevasse it will be distorted by energy waves caused by the rings activation in the control room. This crevasse may be similar to the 'Honeycomb' channels that are used for faster travels, power storage and that Foehammer comes out of in the beginning of the Level, Assault on the Control Room in Halo: Combat Evolved.
 * Throughout the fight on the ground floor with the first waves of Flood, a Rocket Launcher and a Fuel Rod Gun can be found near the lower structures of the tower, each carrying eight Rockets, and 20 Fuel Rods, respectively.
 * It is possible, but very difficult to kill the Monitor without the Laser. Give the Arbiter the Rocket Launcher then blast away with the Fuel Rod Gun (with all the spare ammo found in the entire level) and probably all of your grenades. It usually exhausts the player's Fuel Rod and takes the Arbiter a while, but the Monitor will eventually die.
 * The soundtrack for the second half of the level is called "Greatest Journey", however during the MJOLNIR Theme part, there are some musical parts that are not featured in the shipped version of the soundtrack title but they are featured in "To Kill a Demon" and "Three Gates" soundtrack titles.
 * There are hidden vehicles on this level during the Warthog Run. They are 4 Ghosts, 2 Choppers and a Mongoose (The Ghosts can only be found if Legendary Co-Op), making it so players can finish the level on four player Co-Op in all different vehicles. Also, getting out of a Ghost while in midair during the final jump can result in the ending cutscene starting before the players enter the cargo bay.
 * Completing this level with four people over Xbox Live on Legendary with the Iron skull on and all four players in a Ghost, will reward players with the Vidmaster Challenge: Annual Achievement.
 * This is the last level in the whole series where you have to fight the Flood (this if you exclude the Flood simulations on Infinity.