Seven



Bungie Studios has long enjoyed using the number seven in its games in as many ways as possible. Therefore, in many of their games, this eccentric idea has caused a wild hunt for as many references to the number as possible (even if they are unintentional).

In order to keep the list relevant, please refer to the following guidelines:


 * 1) No seven character words/phrases.
 * 2) Subject must directly relate to Halo.
 * 3) Numbers cannot just merely contain 7 as a digit. (e.g. no 17).
 * 4) If numbers are to be placed into equations, the operations are to be kept consistent. (e.g. no 1+2+8-1+6-9=7).
 * 5) No fan fiction, including machinima such as Red vs Blue.

Halo: The Fall of Reach

 * The book takes place, for the most part, in 2552 and 2525, 2 + 5 + 2 + 5 = 14, or 7 &times; 2. It could also be written as 2 + 5 = 5 + 2. They are all equal to 7.
 * The children observed 7 wolves attack a moose in class.
 * On October 7, 2525, three UNSC vessels were sent to investigate why the Colonial Administration Authority had lost contact with the Harvest system.
 * A destroyer was only 7 meters longer than a Frigate.
 * Keyes could only count 7 UNSC vessels still intact after the battle of Sigma Octanus.
 * Four Covenant frigate ships are an even match with 7 UNSC destroyers.
 * Jericho VII. VII = 7 in Roman Numerals.
 * Lieutenant Keyes notes he graduated from UNSC OCS "only 7 weeks ago."
 * Lieutenant Hall has written 7 physics papers on Slipspace communications.
 * Hall reports a collision in 7 seconds.
 * They are surrounded by 7 soldiers.
 * Cortana accessed SATCOM observation beacon 419. 4 + 1 + 9 = 14 = 7 + 7
 * 7 Covenant frigates were pursuing the Pillar of Autumn
 * The Pillar of Autumn carried 7 C709 Longsword-class Starfighters.
 * The First SPARTAN introduced after John was Sam-034 (0+3+4=7)
 * In the battle for Sigma Octanus the UNSC fleet fired "A 21-gun salute 3 times over for the fallen cradle." (21/3=7)
 * MJOLNIR has 7 letters.
 * SPARTAN has 7 letters in it.
 * John 117. 1x1x7=7.

Halo: Combat Evolved (and Halo: The Flood)
It is speculated that some of the weapons work most effectively if seven shots are fired at an enemy. (7 Needler shots will make an explosion)
 * In the first cutscene of the game Cortana says to Captain Keyes she destroyed " three, make that four" covenant ships (3+4=7).
 * The escape pod used by the Master Chief to escape from the Pillar of Autumn is number 61(6+1=7).
 * It is possible to kill Sergeant Major Avery Junior Johnson a total of seven times.
 * There are seven Halo Installations.
 * 343 Guilty Spark: derived from the value 343 is 73. Additionally, G and S (as in "Guilty" and "Spark") are respectively the 7th and 7th-from-the-last letters of the English alphabet.
 * In Chapter Seven of The Flood, the date is "Seventh Cycle, 49 units '(Covenant Battle Calendar)'". 49 = 7 &times; 7
 * In Halo: The Flood, Silva wishes he had 7 Lt. Mckays'.
 * The Kanji character for seven (七) is on the M6D Pistol.
 * You need at least seven needles from the needler to make an explosion.
 * Echo 419: 4 + 1 + 9 = 14; 7 &times; 2. 419 is also the number for the SATCOM observation beacon Cortana breached in Halo: Fall of Reach
 * Cortana instructs Echo 419 to extract them at external access junction 4C. C is the 3rd letter of the alphabet, 4+3=7
 * After destroying the fusion core on the Pillar of Autumn, Master Chief drives a Warthog through a class 7 service corridor.
 * The last Longsword on the Pillar of Autumn was in launch bay 7.
 * 7 is scratched onto the wall of the Pillar of Autumn
 * On the level The Maw the countdown timer for the destruction of the engines is stopped by 343 Guilty Spark at 13:30. 1+3+3+0=7.
 * There are seven locations used in the levels. The Pillar of Autumn used the same location as The Maw, The Truth and Reconciliation used the same location as Keyes, and Assault on the Control Room used the same location as Two Betrayals. The locations from Halo, The Silent Cartographer, 343 Guilty Spark, and The Library are not reused.
 * Sergeant Johnson appears in 7 levels.
 * If you look at the sun, then turn slightly in any direction, you can see that there are seven circles in the lens flare.
 * In the last cutscene of Assault on the Control Room there are 7 pillars of light in the background.
 * Multiplayer map Chiron TL-34: 3+4=7
 * The year is 2552---2+5=7+5+2=7   7+7=14/2=7
 * There are 7 pairs of Hunters to fight.

Halo: First Strike

 * There are seven Covenant ships in the system after Halo's destruction.
 * Spartan-104 accidentally spams FLEETCOM 7 during the descent of the Pelican Bravo 001.
 * There were only seven human survivors from the Destruction of Halo.
 * Cortana has to manipulate 88 variables. 8+8 = 16, 1+6 = 7.
 * Cole Protocol, Subsection seven, is stated.
 * The Spartans on Reach arrive at ODG Facility A-331. 3 + 3 + 1 = 7
 * The Covenant flagship Ascendant Justice has seven plasma turrets.
 * The Spartans try to save Reactor Complex Seven.
 * There are seven surgical bays in the infirmary of CASTLE Base.
 * As she is deleting Araquiel, Dr. Halsey taps the level seven security barriers.
 * Ascendant Justice arrives in Epsilon Eridani 700,000 kilometers from the system's center.
 * John says that it is the seventh time they have trained with Tango Company.
 * After their mission against Tango Company, the Spartans are supposed to rendezvous with Chief Petty Officer Mendez at 0700 hours.
 * There were seven service drones aboard the Gettysburg.


 * The dead crew of the Gettysburg is placed in cargo bay seven.
 * The Spartans must move seven kilometers further up the top lobe of the Unyielding Hierophant.
 * The Master Chief sets his Lotus Anti Tank Mine detonator for seven seconds.

Halo: Ghosts of Onyx

 * The Spartan IIIs of Beta Company had been launched from Slipspace seven hours ago.
 * Seven Covenant cruisers appear.
 * K7-49: 49 = 7 x 7
 * A group of Sentinels were linked in a triangle, numbering 49 (7x7=49).
 * One hour and seventeen minutes were left until the door closed, which adds up to 77. Interestingly, if displayed on a digital clock, the time would appear as 1:17, or 117 (Master Chief's Spartan ID).
 * "Only the seven Spartans here."
 * "What Sangheili Major would dare disobey a Ship Master who had led seven glorious campaigns against their enemies?"
 * "The seven Sentinels adjusted their aim and their spheres glowed red, amber, and then glistening gold."
 * The ceiling above where the Spartans landed in the construct was 7 sided.
 * The Semi Powered Infiltration Armor has 7 minutes of breathable air.
 * Chapter 37 begins on page 343, 7^3
 * Spartans Will's Tag is 043 (4+3+0 = 7)

Halo 2 E3 Demo

 * 7 Jackals form a phalanx with their energy shields, fire at Chief with their Plasma Pistols, and are splattered by a Warthog.

Halo 2

 * In the video showing Reach being glassed there are 7 covenant ships glassing it.
 * The symbol on the Banshees wings is made up of 7 red blocks.
 * The maximum ammo the Battle Rifle can have is 108. (8-1=7).
 * The maximum ammo the SMG can have is 180. (8-1=7).
 * In Halo 2 there are 7 Covenant races seen: Grunts, Jackals, Drones, Hunters, Brutes, Elites, and Prophets.
 * Setting is year 2552. 2+5=7 &times; 5+2=7.
 * Master Chief's new armor MARK VI: alphanumeric=13+1+18+11+6(VI)= 49 (7x7=49)
 * Halo 2's highest multi-kill medal is Kilimanjaro, which is 7 kills within 4 seconds of each other. Also, there are 7 stars on medal.
 * If you look closely at the Master Chief's helmet, you can see a faint 7 (This is best viewed in the 1st cutscene on Metropolis).
 * It takes 7 shots to lower the pistons in the Sacred Icon level.
 * 7 Shotgun shots to the front of an empty Warthog will destroy it.
 * 2401 Penitent Tangent: 2401 is 74. Also, 2+4+0+1=7.
 * Serial number of the In Amber Clad is FFG-142.  1 + 4 + 2 = 7. Also 14/2=7.
 * 2401 times 343 is equal to seven to the seventh power (823,543).
 * The Cairo Station is identified as UNSCDF-ODA142 CAIRO. 1 + 4 + 2 = 7
 * One of the special Zanzibar Signs occurs on 07/07.
 * The Gravemind speaks mostly in heptameter, a poetic style with seven meters per line.
 * On Outskirts, in the small dark room where the IWHBYD skull is located, there is a number 7 on the wall.
 * The phrase "I Would Have Been Your Daddy" has 7 syllables.
 * The IWHBYD skull can only be found once every 7 times you play the level. The skull is named after a line in the campaign, which also includes the words, "but the dog beat me over the fence."
 * At the end of the credits the "t" is replaced with a 7 in the sentence "And a whole load of people we didn't get time to 7hank"
 * To obtain the IWHBYD skull, one must face 7 waves of Ultra Elites, with 7 elites in the 7th wave.
 * On the level Cairo Station where the Arbiter gets branded with the Mark of Shame, there are 7 tiers of bleachers for the audience.
 * There are 7 game types.
 * In Outskirts on your way to the blind skull there is a sign bearing the number 7 nailed into the wall.
 * Near the end of Outskirts in the tunnels when the Covenant regroup. At certain parts of the tunnel "C-4" can be read above on the sides of the road. C=3, 3+4=7
 * Also C-4 is the Hanger the Master Chief escaped halo onboard a Longsword in.
 * There are currently 7 Covenant vehicles. Wraith, Ghost, Spectre, Scarab, Banshee, Phantom and the Shadow.
 * There are also only 7 usable vehicles in the game. They are the Scorpion, Wraith, Spectre, Warthog, Gauss Hog, Ghost, and Banshee.
 * In a deleted scene, a longer version of the cutscene at the start of "Sacred Icon", Truth and the Arbiter were viewing 7 murals that showed how the Covenant had grown.
 * There is a clearly visible 7 scratched into the cheek of Miranda Keyes
 * The ODSTs seen in-game belong to the 7th Orbital Drop Shock Trooper Division.
 * After the half-closed highway door in Metropolis, before the section "This Town Ain't Big Enough for the Both of Us," you go through a tunnel, turn to your right and you will see some squares with numbers in them that are 2, 2, and 3. 2+2+3=7
 * You fight in 7 levels as the Master Chief (Cairo Station, Outskirts, Metropolis, Delta Halo, Regret, Gravemind and High Charity.
 * When you zoom in either the Covenant Carbine or the Fuel Rod Cannon, there are 7 hexagons making up the center.
 * In Metropolis, near the end of the level where you have to destroy the Scarab, there is the sergeant with the communicator. On the back of this communicator is the Hindi word for seven, written in the Hindi script.
 * In The Armory there are 7 visible MAC cannons (six out in the distance and Cairo itself), but only in the first and second space part.
 * Firing the Plasma Rifle until it overheats will drain 7 power units, assuming it is not burst fire.
 * Counting the "training level" (Armory), there are 14 levels. 14/2=7
 * In Headlong, there is a sign in the building next to the Banshee spawn point that reads: 2,2,3,W. 2+2+3=7.
 * On the multiplayer level Zanzibar there are 7 palm trees and seven cylinder crates
 * On Headlong near the bridge which connects to the Needler Building there is a piece of paper with the number 7 pinned on the wall.
 * In Headlong the maximum ammunition in the building which houses mostly Covenant weapons is 7 canisters or 700 fuel units.
 * The multiplayer map Containment has 7 "pyramid fusion coils"
 * The multiplayer map Lockout has 14 Forerunner fusion coils. 14/2=7
 * The Grunt Birthday Party Skull has 7 Grunts around it.
 * The multiplayer map Terminal has a large 7 on the station building.
 * There is a 7 on the lower part of a Pelican's ramp.
 * The Arbiter's camouflage lasts 7 seconds (on Normal).
 * There are 7 ranks of Elites.
 * There are 7 syllables in I would have been your daddy
 * "This Town Ain't Big Enough for the Both of Us," has 7 capital letters, TTABEBU and 7 different letters at the begining of it's words, TABEfoU.
 * On the Single Player level Regret (Level), there is a ring of seven plasma grenades.
 * It takes 7 seconds for a Ghost or Banshee to explode a second time after it has been rendered un-usable.
 * You face seven Hunters in the level Gravemind.

Halo 3

 * Miranda Keyes has a seven engraved in her cheek.
 * In one of the Terminals, it is revealed that Mendicant Bias made contact and studied the Gravemind for 379,807 hours. 379,807 divided by 24 (hours in a day) equals 15,825 days. 15,825 / 365 (days in a year) equals 43 years. 4 + 3 = 7.
 * There are seven races within the Covenant Loyalists - Prophets, Brutes, Grunts, Drones, Jackals, Hunters, and Engineers
 * It takes 7 seconds for the bridge on Last Resort to lower itself onto the wheel.
 * By the end of Halo 3, seven forms of the Flood have been seen in the trilogy (not including the deleted Flood Juggernaut in Halo 2). These are: Infection, Combat, Carrier, Pure, Prophet, Proto-Gravemind, and Gravemind.
 * The UNSC Forward Unto Dawn has the number 7 on the front of it.
 * The Second Battle of Mombasa lasted seven days.
 * It takes seven needles to make a target explode.
 * If you draw a line between Mount Kilimanjaro (in the background of the Halo 3 E3 trailer), Mombasa and Zanzibar island you get a huge 7.
 * The release date was September 25 2007. 2+5=7
 * There are 49 confirmed achievements in Halo 3. 49=7 &times; 7
 * “The casing is constructed of an unusual porous metallic compound. Shrapnel from the Type-2 reaches a temperature of approximately 270 to 315ºC and retains that heat for upwards of seven seconds. By design.” Taken from Bungie.net on spike grenades.
 * There are 7 large objects in the background of Sandtrap, the six pillars and the Aegis Fate Frigate.
 * The Frigate on Sandtrap, Aegis Fate, has 9 letters and is made up of 2 words. 9-2=7.
 * The CQB armor was designed using feedback from the Jericho VII theater.
 * In the Halo 3 museum Pawel Czernek mentions that "on the seventh day we ran out of ammo".
 * In the mission Crow's Nest, a rocket has the number 7 on each side, making 4 7's, or 7777.
 * Last Resort (Level) is Zanzibar Municipal Turbine 7.
 * The SMG has a scratch in the shape of a 7(easier to see if gun is aimed at sky or near a light source).
 * If you're on open ground it takes 7 seconds to gain full speed in a mongoose.
 * It takes 7 seconds for 343 Guilty Spark to explode after being dealt the fatal shot in the level Halo.
 * It takes 7 seconds from being infected by an infection form to turn into a combat form.
 * In the level Cortana, in the beginning of the cutscene where you rescue Cortana, there is 7 seconds of silence before she says "You found me".
 * High Ground has a vague "7" shape in the middle of it.
 * After Truth's first speech (after activating the rings) on the level The Covenant ("How could I have known the Parasite..."), it takes seven seconds for his hologram to disappear.
 * At the beginning of the level The Covenant there are 5 Pelicans and 2 Elite Phantoms, adding up to 7.
 * The seventh level of the game (The Covenant) is the last level of the series (chronologically) where you fight against covenant enemies.
 * On the side of the Warthog, below where the driver and passenger get in, just above the side skirts, there are 7 dashes.
 * There are 7 rivets holding the panel on each side of the worthog right below the driver or passenger entry opening.
 * In the Citadel on the level "The Covenant", there are seven rings, Ring 1 being closest to the lift and Ring 7 being closest to Truth. In order to find the "I Would Have Been Your Daddy" skull (which has a seven-syllable name), you have to jump through four of the rings seven times.
 * In this order: 4 6 5 4 5 3 4.  4 + 6 + 5 + 4 + 5 + 3 = 27,   also the last two rings are 3 and 4:   3 + 4 = 7
 * Only seven Sangheili ranks are seen in Halo 3.
 * In the multiplayer level, The Pit there are 7 Pelicans in the airfield (the area on the other side of the wire fence)
 * When dual wielding SMGs, it takes 7 seconds to run out of ammo if you hold down the trigger.
 * In the level Crow's Nest, when you first take control of the Master Chief, the emergency power generators on the far side of the room, where you need to go to get the Black Eye Skull, have the writing "EPG 2401". 74 = 2401. Also, 2+4+0+1=7. Also 2401 is the number of the other monitor you see in Halo 2, 2401 Penitent Tangent
 * When Johnson Gives you a Spartan Laser during the level Halo to kill 343 Guilty Spark with, it always has a 7 for the ten's digit in the remaining battery power. (unless you have the Famine skull on).
 * The Scarab, once the core has been compromised, takes 7 seconds to explode.
 * If you exit Epitaph in pan-cam mode, there are 7 lines in the dirt surrounding the tower that houses the map.
 * The Human-Covenant War ended on March 3rd 2553 (3+3+2+5+5+3=21) 21/3=7
 * In Tsavo Highway the doors at the start of the level all have the number 7 on them.
 * A single Spartan Laser cost more to produce than 7,266 frag grenades. 7+2+6+6=21. 21/3=7
 * There are 5,632 spartan armor permutation varieties available(5+6+3+2=16 / 1+6=7)
 * In the multiplayer level Sandtrap, the UNSC frigate, Aegis Fate, has a number 7 surrounded in a star on the side.
 * When Miranda Keyes dies, there are 7 spikes from the Brute Spiker lodged in her back.
 * In the Level The Covenant, there are 7 Elites that help you (not including the Arbiter or the other Elites in 3 or 4 player co-op).
 * Not Including Arrival There are 7 levels that the Cortana and Gravemind Moments occur.
 * Cortana and Gravemind Moments occur 28 times. 28 is a multiple of 7.
 * In the new legendary map pack there are 7 forge filters.
 * There are 21 brute ships over the portal,21/3=7
 * 7 Brute ships fled to the Ark.
 * There are 7 lists of objects to put on a map in Forge. Weapons, Vehicles, Equipment, Scenery, Teleporters, Respawn Points, and Goals.
 * On Foundry, the fuse boxes all have the number 25 on them. 2+5=7
 * Including the Legendary ending, the cutscene times add up to 43:59. 4+3=7, 5+9=14. Also, 4+3+5+9=21, 21/3=7.
 * The multiplayer medal "Killionaire" has the pattern 343. 343=7x7x7
 * The Hayabusa helmet has 7 spokes on it.
 * There are 7 Terminals
 * The Human-Covenant war was 28 years long 28/4=7
 * There are 7 total Halo rings.
 * The Bungie Day painting advertising Halo 3 has 7 visible Spartans.
 * There are 7 displays on the HUD in Campaign (Grenades, Equipment, Shields, Radar, Way points, Ammo, and Meta-Points (If enabled).
 * There are 7 main Characters in Halo 3 (Master Chief, The Arbiter, Cortana, The Prophet of Truth, Gravemind, Sergeant Johnson, and Miranda Keyes).
 * There are seven levels where Cortana is not with you (Not including Arrival)
 * The Hornet is shaped as an upside down 7.
 * There are 7 usable vehicles on the level the Ark.
 * Not including The Ark, there are 7 Halo Installations.
 * There are 7 Chieftans in the level 'The Covenant'.
 * It is possible that the map 'Smuggler' is set 7 years after the events of the Halo Trilogy.
 * There are 7 rectangles on each side of the Warthog. (Driver and Passenger under the entrance).
 * The Halo 3 file share storage limit is 25 MB. 2+5=7. Also Bungie Pro has a 250 storage limit. 2+5+0=7.
 * The release date was September 25 2007. 2+5=7 20+07=27 September was the seventh month in the original Greek calender (sept=7).
 * In the multiplayer level Sandtrap, the UNSC frigate, Aegis Fate, has 7 different letters in it, AEGISFT.

Halo Wars

 * A vehicle with the number 3, 1, 3 again, and the letter G appears. G is the seventh letter of the alphabet, and 3 + 1 + 3 = 7
 * In an in-game view, only 7 Scorpions and Wraiths can be selected at a time.

Cortana Letters and Transmissions

 * There are 14 transmissions. 14 = 7 + 7
 * Cortana signs one letter with seven 'X's and 'O's.
 * Cortana sends seven emails. Alternatively, Letter Three was likely never intended, so seven messages were planned.

I Love Bees
While Ilovebees was technically created by 4orty2wo Entertainment rather than Bungie, it is highly probable they were aware of and continued the tradition.
 * When the Apocalypso crashes, all communications in the solar system are disabled for about seven seconds.
 * When players unlocked 777 axons, a voice-actor playing Melissa joined the game.
 * When Kamal Zaman accesses his voice mail, he has seven old messages.
 * Hiro, reading a how-to book on dating, tells Kamal to skip to chapter seven.
 * A part of the game had players guiding the Sleeping Princess out of her "glass coffin", a prison in her mind appearing as a story-tale world. Players would have to guide her down various paths marked by signs with unusual markings. The correct paths are Deadly Sins (there are seven), Waves (seven seas), and Skinny Cow and Fat Cow (in the Bible, the Pharaoh had a dream about seven skinny cows that ate seven fat cows).
 * When Rani tries to start a chatter business with a friend, their equipment only manages to produce 49. 49 = 7 x 7
 * Rani leaves with 14. 14 = 7 + 7
 * As of 2004, Aunt Margaret has been beekeeping for seven years.
 * Yasmine Zaman's augmentations are preformed in Lab 7.
 * Yasmine Zaman washed out of the Spartan II program at age 14. 14/2=7
 * Margaret Efendi's email address, later hijacked by the AIs, is ladybee777@hotmail.com

Halo: Contact Harvest

 * There were seven space elevators.
 * The first space elevator of the Tiara to collapse was the seventh elevator.
 * There were seven small boxes streaking up the Tiara's elevators.
 * Twenty-eight containers were already on the strands in coupled pairs of fourteen. Both 28 and 14 are divisible by 7
 * Every five minutes there were seven pairs of containers that would rise.
 * Later Loki changed the five minute interval for the containers to seven minutes.
 * An ONI report after the Epilogue under <\ CIVILIAN CONTRACTOR "Charlie Hotel" was in brackets [ONI.REF #409871]... 409,871 divided by 58,553 is equal to 7.
 * In that same report can be found 2 other references. The first found in the line SOURCE.REF#JOTUN-s2-05866. 5,866 divided by 838 is 7. And the second is found in the line SOURCE.REF#JOTUN-S4-021147. 21,147 divided by 3,021 is 7. Also, 21 divided by 3 is 7.
 * When Staff Sergeant A.J. Johnson offers his hand to Byrne, he hesitated, enough for Jenkins to count from push-ups 38-45. (45-38=7)

Dates

 * The Prophets left their homeworld in the 7th Century BC (648 BC).
 * Most of Halo is set in years beginning with the number 25. 2+5=7

Misc.
"SEVEN summers old Lovely Lyca told; She had wander'd long Hearing the wild birds' song."
 * The M6 series of pistols has another seven. M is the thirteenth(13th) letter of the alphabet. 13-6=7.
 * Commander Miranda Keyes had a seven inscribed in her cheek in Halo 2.
 * Seventh Column is the name given to Bungie's official fan club.
 * The Master Chief stands 7' tall.
 * Sangheili stand 8'6" tall. 8+6=14 and 14/2=7
 * There are seven remaining Spartan-IIs still able to fight: John, Fred, Kelly, Linda, and Gray Team, the three missing at the start of the mission to capture a Prophet.
 * The Ascii Master Chief in a Bungie Weekly Update was made with 7s.
 * There are 7 different Covenant races seen in game.
 * In the Halo 2: Original Soundtrack Vol. 1, there are 21 songs. 21=7 &times; 3
 * There are 14 wieldable UNSC weapons in the Halo games and Books. 7 &times; 2=14
 * The Master Chief's number is 117. 1 X 1 X 7 =7
 * Smart AIs (such as Cortana) go rampant after seven years of activation.
 * Slipspace has 11 dimensions. The 4 in our universe + 7.
 * The Tiara has 7 orbital elevators.
 * There are 7 Halo rings throughout the Halo Series
 * In the credits for Halo 2 and Halo 3 instead of simply using the word "thank" they replace the first letter with a 7, making it "7hank"
 * Including "The Heretic", "Armory" and "Arrival" there are 10 levels in Halo: CE, 15 levels in Halo 2, and 10 levels in Halo 3. 10+15+10=35. 35/5=7.
 * In the Halo: Combat Evolved Soundtrack, the total running time is 1:05:08. 1+5+8=14, 14/2=7.
 * Considering its 10,000 km diameter, Halo would need to rotate at 7 km/s in order to produce artificial Earth-like "gravity" (from centripetal force).
 * In the Cortana Letters "... In my palace deep, Lyca lies asleep ..." is mentioned on the 7th letter and is believed to be from the poem "The little girl lost-By William Blake". One verse says:
 * Gravemind speaks in iambic heptameter which is a poem that has 14 lines 14/2=7 and it often uses 7 iambic feet
 * In the preview of Halo 3 featured at the Seattle IMAX theatre, Bungie gave away a prize to the person sitting in seat G7. (Note that G is the seventh letter of the alphabet, so it is essentially 77.)
 * The legendary map pack banner on the official bungie.net. There is a sentence saying: Tru7h. Carnage. Bungie. (Note that the T in truth is represented by a 7.
 * September was the seventh month in the Roman calender until 153 BC. As well in Latin septi means "seven" and septum means "seventh".
 * The Bungie Creed (which you see on their site when looking at job options) include seven things 'to do,' including one to make a giant slingshot and shoot enemies into the sun (this one is the seventh).
 * Technically, all of the "Monitor" Forerunner A.I.'s have I.d. numbers that are multiples of seven.
 * The Forerunner Dreadnought has 14 x 14 x 14 dimensions. 14 = 7+7.
 * The difference from the Halo 1 Assault Rifle to the Halo 3 Assault Rifle clips is 28 bullets. 28/4 = 7.

This may be kind of random, but Halo 3 was nominated for 7 awards on the Spike TV awards.

117
117 is Master Chief's SPARTAN tag number, but there is more than meets the eye when it comes to this number, including many religious and historical references.

Biblical Reference

 * John-117 is believed by many fans to be a reference to New Testament of the Christian Bible.


 * Bungie Studios is known to have placed many biblical references in their earlier Marathon video game series, and many other such references have been found in the Halo series.


 * Here are passages from the Book of Revelation (more formally known as The Revelation of St. John the Divine). Revelation in Greek is called "The Apocalypse", a title possibly shortened from "The Apocalypse of John."


 * "When I saw him, I fell at his feet as though dead. Then he placed his right hand on me and said: 'Do not be afraid. I am the First and the Last.'"
 * "I am the Living One; I was dead, and behold I am alive for ever and ever! And I hold the keys of death and Hades."
 * Book of Revelation, NIV. Chapter 1 - verses 17 and 18.


 * "And when they shall have finished their testimony, the beast that ascender out of the pit shall make war against them, and shall overcome them, and kill them."
 * Revelation. 11:7


 * There are also references in one other book of the Bible. 1 John houses these:


 * "But if we walk in the light as He is in the light, we have fellowship with one another, and the blood of Jesus Christ cleanses us from all sin."
 * 1 John 1:7 (1 John 1: 7)
 * "And the world is passing away, and the lust of it; but he who does the will of God abides forever."
 * - 1 John 2: 1 7


 * And here are passages from the Gospel of John. These are thought less likely to be references:


 * "Then after that saith he to his disciples, Let us go into Judea again."
 * Gospel of John, 11:7


 * "For the law was given by Moses, [but] grace and truth came by Jesus Christ."
 * Gospel of John, 1:17

Site 117
Alternatively, others believe the number to be a reference to "Site 117", an archaeological site containing the first evidence of a human battle. The site is near Jebel Sahaba, Nubia and dates from between 12,000-10,000 BC. The site contains 59 human remains of men, women and children who were clearly killed with primitive hunting implements.

117 and 7
Seven has long been a number associated with Bungie. The first three numbers of 76 are 117, the full number being 117649. Also 1*1*7 = 7 and 1+1+7+6+4+9=28 28/4=7.

The 7th Halo' Monitor code is 117649. Maybe the 117 is significant because it's the 7th Halo, however the 649 could be significant as well. 9+4-6=7.

The number 819 appears numerous times in the Marathon series. 819/7=117.

Marathon
In Marathon Infinity there was a hidden multiplayer map called Hats Off to 819 (named after fan Hamish Sinclair, H=8, S=19) 819 divided by 7 is 117

117 Trivia
In Halo 3, the game won't let you input the tag I-17 or l(lower-case L)-17 saying that these numbers are already reserved by the UNSC.

Related Links

 * List of Biblical References in Halo
 * List of Marathon References in Halo