List of Combine terminology

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This article contains a comprehensive list of Combine terminology used by Combine units and the Overwatch Voice throughout the Half-Life series, encompassing Half-Life 2, Episode One, Episode Two and Half-Life: Alyx.

Radio codes

Civil Protection and Overwatch Voice bases its radio codes on the real-life California Penal Code. In addition, the Combine Chatter section of Half-Life 2: Raising the Bar (page 282) provides clear insight on what each code means.

Basic codes

Code	Meaning	Example quote	Filename(s)
Code 2	Proceed immediately with lights/without sirens	All units code 2.	allunitscode2
Code 3	Proceed immediately with lights and sirens	All units at location, respond code 3.	allunitsrespondcode3
Code 4	No further assistance required	Holding on 10-14 duty at code 4.	holdingon10-14duty
Code 7	Out of service to eat	Code 7.	code7
Code 12	Patrol your district and report extent of damage	All units return to code 12.	allunitsreturntocode12
Code 30	Officer needs assistance — emergency	(Not used in-game)
Code 100	In position to intercept suspect	Clear and code 100.	clearandcode100

Penal codes

Code	Meaning	Example quote	Filename(s)
17f	Fugitive detachment	17f fugitive detachment	fugitive17f
24	Medical emergency	(Not used in-game)
27	Attempted crime	27 attempted crime	attemptedcrime27
34s	Shooting	All units BOL we have 34s at	allunitsbol34sat
51	Non-sanctioned arson	51 non-sanctioned arson	nonsanctionedarson51
51b	Threat to property (Bomb threat)	51b threat to property	threattoproperty51b
52	Simple arson	(Not used in-game)
56	Criminal damage	(Not used in-game)
62	Alarms	62 alarms	alarms62
63	Criminal trespass	63 criminal trespass	criminaltrespass63
63s	Illegal in operation (Sit-in)	63s illegal in operation	illegalinoperation63s
69	Possession of resources (Possession of stolen goods)	69 possession of resources	posession69
94	Weapon (Illegal use of weapon)	94 weapon	weapon94
95	Illegal carrying (Illegal carrying of gun)	95 illegal carrying	illegalcarrying95
99	Reckless operation	(Not used in-game)
148	Resisting arrest	148 resisting arrest	resistingpacification148
211	Armed robbery	(Not used in-game)
52	Simple arson	(Not used in-game)
243	Assault on Protection Team	243 assault on Protection Team	assault243
245	Assault with a deadly weapon	(Not used in-game)
404	Riot	404 riot	riot404
407	Unlawful assembly	(Not used in-game)
415	Civic disunity (Disturbing the peace)	415 civic disunity	disturbingunity415
415b	Investigate the trouble	(Not used in-game)
447	Arson	(Not used in-game)
459	Burglary	(Not used in-game)
505	Reckless driving	Dispatch, we need airwatch, subject is 505.	airwatchsubjectis505
507	Public non-compliance	507 public non-compliance	publicnoncompliance507
603	Unlawful entry	603 unlawful entry	unlawfulentry603
647e	Disengaged from workforce (Loitering place to place)	Anyone else pickup a 647e reading?	anyonepickup647e

Location prefixes

Civil Protection and the Overwatch Voice utilize location prefixes to designate areas into categorical sections. These prefixes are accompanied by a number from one to nine. Because Metro Cops are not encountered in some levels, many of these location prefixes are not heard in-game.

Half-Life 2

Location: sound/sentences.txt (location prefix by mapname), npc/metropolice/vo (filenames), sound/npc/overwatch/radiovoice (filenames)

No map (default)

Name	Filename(s)
Block	block
Zone	zone
Sector	sector

City 17 Trainstation (trainstation)

Name	Filename(s)
Station block	stationblock
Transit block	transitblock
Workforce intake hub	workforceintake

Canals (canals)

Name	Filename(s)
Canal block	canalblock
Storm system	stormysystem
Waste river	wasteriver
Deserviced area	deservicedarea

Black Mesa East (eli)

Name	Filename(s)
Industrial zone	industrialzone
Restricted block	restrictedblock
Repurposed area	repurposedarea

Ravenholm (town)

Name	Filename(s)
Condemned zone	condemnedzone
Infested zone	infestedzone
Non patrol region	nonpatrolregion

Coast (coast)

Name	Filename(s)
External jurisdiction	externaljurisdiction
Stabilization jurisdiction	stabilizationjurisdiction
Outland zone	outlandzone

Nova Prospekt (prison)

Name	Filename(s)
External jurisdiction	externaljurisdiction
Stabilization jurisdiction	stabilizationjurisdiction

City 17 (c17)

Name	Filename(s)
Residential block	residentialblock
404 zone	404zone
Distribution block	distributionblock
Production block	productionblock

Citadel (citadel)

Name	Filename(s)
High priority region	highpriorityregion
Terminal restriction zone	terminalrestrictionzone
Polity: control section	controlsection

Phonetic alphabets

Combine units communicate using a phonetic alphabet, a set of clear code words for communicating the letters of the Roman alphabet. These phonetic codes appear differently in Half-Life 2 and its episodes versus Half-Life: Alyx.

Half-Life 2

Location: sound/sentences.txt (phonetic alphabet/codes), sound/npc/combine_soldier/vo (filenames)

Character	Telephony	Example quote	Filename(s)
A	Apex	Team Sundown 3, set viscerators in sector Apex 5, and advance for contact. We have biotics in the perimeter.	prison_soldier_visceratorsA5
B	Boomer	Overwatch confirms double boomers dispatched inbound, ghost drop inbound, prepare for skyshield heavy suppression and wrapup.	prison_soldier_boomersinbound
E	Echo	Echo.	echo
F	Flatline	Flatline.	flatline
H	Helix	Team Sundown 3 deserviced, Helix 2 go active and intercept, Leader 12 out.	prison_soldier_sundown3dead
I	Ice, ion	Ice.	ice ion
J	Jet	block 64 jet.	block31jet
K	Kilo	Kilo.	kilo
M	Mace	block 31 mace.	block31mace
N	Nova	Nova.	nova
P	Payback	Payback.	payback
Q	Quicksand	Quicksand.	quicksand
R	Ripcord	Ripcord.	ripcord
S	Sundown	Team Sundown 3 deserviced, Helix 2 go active and intercept, Leader 12 out.	sundown
U	Uniform	Uniform.	uniform