Seven

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"Some of you may be wondering - "What's up with this unhealthy obsession with the number 7?" This page offers some insights."

— Brian Jarrard, linking to this very page

"Cause that's the best number. It's like rock. Nothing beats rock or 7."

— Michael Wu

7

Bungie has long enjoyed using the number seven (7) in its games in many prominent ways. Ensemble Studios and authors also have certain obvious seven references in their works about Halo. While almost anything can be made into a reference to something with effort or constructed accidentally through pareidolia, the following attempts to list the intentional references Bungie placed into Halo for the fans to find. As such, not all of these references may be fully accurate, and many of them may be proven to be false at any time. Bungie's obsession with the number seven may be attributed to 7 being considered a lucky number in Western culture. In spite of the fact that the number seven is featured extensively in Bungie's work, it has generated an aura of apophenia. This cultural nuance can be compared to the 23 enigma.

After Halo Studios (then 343 Industries) took over the Halo franchise in 2011, references to 7 have continued, possibly as a homage to Bungie.

Halo: The Fall of Reach (and Halo: Fall of Reach)

Main articles: Halo: The Fall of Reach, Halo: Fall of Reach

• Lieutenant, Junior Grade Jacob Keyes graduated from UNSC OCS 7 weeks before being assigned to observe SPARTAN-II candidates with Dr. Halsey
• During Keyes's second year at OCS he was involved in an incident which killed fourteen Ensigns. 14/2=7
• John attended Elysium City Primary Education Facility Number 119 before being abducted for the SPARTAN-II Program. 119/7=17, 1x7=7.
• John's SPARTAN tag is 117 (1x1x7=7).
• Samuel's SPARTAN tag is 034 (0+3+4=7).
• Deja showed the children a hologram of a meadow with 7 wolves hunting a moose.
• On October 7, 2525, three UNSC vessels were sent to investigate why the Colonial Administration Authority had lost contact with the Harvest system. 2+5=7
• The Medical Facility "Hopeful" was gone for 7 days.
• The human colony Jericho VII is introduced. VII = 7 in Roman Numerals.
• A UNSC destroyer was only 7 meters longer than a frigate.
• Lieutenant Hall has written 7 physics papers on Slipspace communications.
• Four Covenant frigate ships are an even match with 7 UNSC destroyers.
• Hall reports a collision in 7 seconds.
• After the UNSC Cradle sacrificed itself, the rest of the fleet destroyed seven Covenant ships with their MAC volley fire.
• Jacob Keyes could only count 7 UNSC vessels still intact after the Battle of Sigma Octanus IV.
• When the SPARTANs test the MJOLNIR suit with shields, when John-117 gets ready to go outside there are 7 ODSTs standing outside around the tent.
• The UNSC Pillar of Autumn carried 7 C709 Longsword-class Starfighters.
• 7 Covenant frigates were pursuing the Pillar of Autumn.
• On page 11 of Halo: Fall of Reach - Boot Camp, Halsey is seen looking at a hologram of John-117's physique, with a few genes labeling around it. Each of these labels are seven nucleotides long.

Halo: Combat Evolved (and Halo: The Flood)

Main articles: CE, Halo: The Flood