Start Half-Life 2 with the -console command line parameter.  Then, during the game, press ~ to display the console window.  Type in one of the following codes to activate the corresponding cheat and then close the console window:  (NOTE: Any code can be activated in the command line parameter simply by adding a "-" before the code).

Cheat	Code
Activate Cheats	sv_cheats 1 [NOTE]
God Mode	god [NOTE]
All Weapons	impulse 101 [NOTE]
Walk Through Walls	noclip [NOTE]
Spawn with any item	give <item name> [See Below]
Spawn a Jeep	impulse 82
Reduce Your Health	buddha
Be Ignored by NPCs	notarget
List All Maps	maps
Load Any Map	map <map name> [See Below]
Show Crosshairs	hud_quickhelp/text? 1
Set the Size of Your Current Weapon (54 is Default)	viewmodel_fov <number>
Enable Mouse Look	+mlook
Toggle Into Developer Mode (2 is verbose)	developer (0-2)
Toggle HUD Display	cl_drawhud <0-1>
Toggle HUD Display II	cl_enablehud <0-1>
Show Frame Rate	cl_showfps <0-1>
Execute Script File	exec <filename>
Control Gravity	sv_gravity <number>
Change Air Density	air_density <number>
Control Length of Confusion from Explosions	dsp_explosion_effect_duration <number>
Control World Friction	sv_friction <number>
Set Minimum Stopping Speed on Ground	sv_stopspeed <number>
Set Maximum Velocity of Moving Objects	sv_maxvelocity <number>

NOTE: The sv_cheats 1 Codes is need to enable God Mode, Walk Through Walls, and All Weapons.

Load Levels

Start Half-Life 2 with the -console command line parameter.  Then, during the game, press ~ to display the console window.  Type in map [a level code below] and press Enter to load that level:

Level	Level Code
Canals 1	d1_canals_01
Canals 2	d1_canals_02
Canals End	d1_canals_end
Tempanals 2	d1_tempanals_02
Town 1	d1_town_01
Town 2	d1_town_02
Town 3	d1_town_03
Town 4	d1_town_04
Town 5	d1_town_05
Train Station 1	d1_trainstation_01
Train Station 2	d1_trainstation_02
Train Station 3	d1_trainstation_03
Train Station 4	d1_trainstation_04
Train Station 5	d1_trainstation_05
Under 1	d1_under_01
Under 2	d1_under_02
Under 3	d1_under_03
Under 4	d1_under_04
Coast 1	d2_coast_01
Coast 2	d2_coast_02
Coast 3	d2_coast_03
Coast 4	d2_coast_04
Coast 4 (2)	d2_coast_04_dx60
Coast 5	d2_coast_05
Coast 6	d2_coast_06
Coast 7	d2_coast_07
Coast 8	d2_coast_08
Prison 1	d2_prison_01
Prison 2	d2_prison_02
Prison 3	d2_prison_03
Prison 4	d2_prison_04
Prison 5	d2_prison_05
C17 3	d3_c17_03
C17 4	d3_c17_04
C17 5	d3_c17_05
C17 6a	d3_c17_06a
C17 6b	d3_c17_06b
C17 7	d3_c17_07

Spawn Weapons

Start Half-Life 2 with the -console command line parameter.  Then, during the game, press ~ to display the console window.  Type in give [a weapon code below] and press Enter to spawn that weapon:

Weapon	Weapon Code
Alyxgun	weapon_alyxgun
AR1	weapon_ar1
AR2	weapon_ar2
Bug Bait	weapon_bugbait
Crowbar	weapon_crowbar
Frag Grenade	weapon_frag
Physcannon	weapon_physcannon
Physgun	weapon_physgun
Pistol	weapon_pistol
RPG	weapon_rpg
Shotgun	weapon_shotgun
SMG	weapon_smg1
SMG 2	weapon_smg2
Cube Map	weapon_cubemap

Spawn Items

Start Half-Life 2 with the -console command line parameter.  Then, during the game, press ~ to display the console window.  Type in give [an item code below] and press Enter to spawn that item:

Item	Item Code
Box of Buckshot	item_box_buckshot
Box of M Rounds	item_box_mrounds
Box of Sniper Rounds	item_box_sniper_rounds
Box of S Rounds	item_box_srounds
Health Kit	item_healthkit
Battery	item_battery
Suit	item_suit
ML Grenade	item_ml_grenade
AR2 Grenade	item_ar2_grenade
Health Vial	item_healthvial