MAIN HALF-LIFE 2 CHEAT CODES:

In order to use the cheats, you must have the console enabled in the game, "C:\Half Life 2\hl2.exe -console" 

When you are in the game, you need to activate the console by pressing "`" (The key to the left of 1) and type the following: 

Code:	Description:
god	Turns god mode on (server side only).
buddha	Reduces your health, but wont let you die.
mpulse 101	Gives you weapons available in the current map.
noclip	Allows you to walk through walls
give item_suit	Gives HEV suit.
give item_battery	Gives the HEV suit and flashlight batteries.
impulse 82	Spawns jeep.
hurtme xx	Hurts the player. xx represents any number between 1 and 100 to specify damage amount.
notarget	Player becomes
npc_create	Creates an NPC. Only works in a world that already has an NPC entity.
npc_create_aimed	Creates an NPC aiming away from the player.
sv_gravity xxx	World gravity. xxx represents the amount.
sv_stopspeed xxx	Minimum stopping speed when on ground. xxx represents the amount.
sv_friction x	World friction. x represents the amount.
sv_bounce x	Bounce multiplier for when physically simulated objects collide with other objects. x represents the amount. (1 is normal)
sv_maxvelocity 3500	Specifies the maximum velocity of any moving object. (edit figure)
air_density xx	Changes the density of air. xx represents the amount.
dsp_explosion_effect_duration x - Specifies length of confusion/ear	ringing effect. x represents the amount.
physcannon_tracelength #	Changes the length that objects can be pulled from
physcannon_cone #	Changes the radius of the cone used to pick up objects
physcannon_maxmass #	Changes how large pulled objects can be
physcannon_pullforce #	Changes how quickly objects are pulled
physcannon_maxforce #	Changes how hard you propel objects
sv_soundemitter_filecheck	Toggle reporting missing .wav files for sounds
mat_numtextureunits #	Limit the number of texture units. (Add number in place of #) (0=Default)
sv_maxvelocity #	Sets Maximum Velocity of any moving object (Add number in place of #)
sv_waterdist #	Set Vertical View when eyes are near water plane.
air_density #	Change the density of air. (Add number in place of #)
dsp_explosion_effect_duration #	Set length of confusion/ear-ringing effect(Add number in place of #)
prop_debug	Toggle bounding-boxes debug mode on/off red - ignore damage, white - respond to damage, green - health)
picker	Toggles Picker mode on
setpos	Move player to specified origin
sv_bounce #	Sets bounce multiplier for physically simulated object collisions
npc_create	Creates an NPC
npc_create_aimed	Creates an NPC (Aiming away from player)
cl_showfps 1	Shows FPS Rate
sv_friction #	Set World Friction (Add number in place of #)
sv_stopspeed #	Set Minimum Stopping Speed on ground (Add number in place of #)
sv_gravity #	Set Gravity (Add number in place of #)
setang	Snap players eyes to a specified pitch yaw
cl_drawhud 1	Toggle HUD display On
cl_enablehud 1	Toggle HUD display On
Map #	Load Map (Input title in place of #)
Developer #	Sets developer mode to on/off/verbose (0-off, 1-on, 2-verbose)
+mlook	Enables mouse look
exec #	Execute a script file (Input filename in place of #)
viewmodel_fov #	Adjusts size of the weapon you're carrying (54 = default)
give #	Give weapon (Input weapon name in place of #)
hud_quickhelp/text? 1	Shows Crosshairs
maps	Displays Map listing
noclip	Ability to walk through walls (Server Side Only)
notarget	Invisible to NPC's
impulse 82	Spawn a Jeep
impulse 101	All Weapons
Hurtme #	Damages player by whatever variable you input as #
buddha	Health never goes below 1
impulse 76	Grunt-O-Matic
give weapon_shotgun	Recieve a Shotgun
thirdperson	Third Person View
firstperson	First Person View
sv_cheats 1	Activates Cheats
crosshair 0	Disables Crosshair
sk_npc_dmg_shotgun #	NPC's do # damage with shotgun
sk_npc_dmg_smg1 #	NPC's do # damage with the smg
sk_npc_dmg_ar2 #	NPC's do # damage with the pulse rifle
mat_depthbias_normal 1	See through walls
give weapon_annabelle	gives you Father Gregori's modified shotgun
ai_disable	toggles enemy AI on/off
sv_infinite_aux_power 1	gives infinite power for sprinting, etc.
impulse 203	removes the item or NPC pointed at
mat_fullbright 1	removes all shadows (a 0 restores them)
skill #	change skill level (# = 1, 2, or 3)
status	shows some game info, incl. current map
help $	replace $ with a command to get a brief description of it
sk_max_357 #	# is new max ammo for .357 Magnum
sk_max_ar2 #	# is new max ammo for Pulse Rifle
sk_max_ar2_altfire #	# is new max ammo for Pulse Rifle energy orbs
sk_max_buckshot #	Raises your max number of shells to that number.
sk_max_crossbow #	# is new max ammo for crossbow
sk_max_grenade #	# is new max ammo for hand grenades
sk_max_pistol #	# is new max ammo for pistol
sk_max_rpg_round #	# is new max ammo for RPG
sk_max_smg1 #	# is new max ammo for submachine gun
sk_max_smg1_grenade #	# is new max ammo for SMG grenades
sv_unlockedchapters #	unlocks chapters 1 thru # (15 is end credits)
sk_plr_dmg_pistol #	# is new damage value for pistol
sk_plr_dmg_357 #	# is new damage value for .357 Magnum
sk_plr_dmg_ar2 #	# is new damage value for Pulse Rifle
mat_fullbright 1	removes all shadows (a 0 restores them)
sv_infinite_aux_power 1	gives infinite power for sprinting, etc.
cl_showpos 1	brings up position display in top right of screen (0 removes it)
getpos	can be used to get current coords for use with setpos
sk_plr_dmg_smg1_grenade #	# is new damage value for SMG grenades
sk_plr_dmg_smg1 #	# is new damage value for submachine gun
sk_plr_dmg_rpg_round #	# is new damage value for RPG rockets
sk_plr_dmg_grenade #	# is new damage value for grenades
sk_plr_dmg_crowbar #	# is new damage value for crowbar
sk_plr_dmg_crossbow #	# is new damage value for crossbow
sk_plr_dmg_buckshot #	Raises damage done by each pellet.
net_graph 1	a more thorough fps display
impulse 83	Spawn an Air Boat
cl_ragdoll_collide 1	Enables ragdolls that don't clip through each other, but stack realistically on one another.
weapon_smg1	MP7 with grenade launcher
weapon_shotgun	Shotgun
weapon_rpg	Rocket Launcher
weapon_pistol	Pistol
weapon_physcannon	The Manipulator
weapon_crowbar	Gordon's classic
weapon_frag	Fragmentation Grenade
weapon_crossbow	Crossbow
weapon_ar2	Overwatch Standard Issue Pusle-Rifle
weapon_bugbait	Bug Bait (from Antlion Guards)
weapon_357	357 Magnum Revolver
sk_plr_num_shotgun_pellets #	Increases pellets fired from each shotgun shell. 100 works well. 1000+ and it lags.
give item_battery	Increases suit charge by 15 points.
give item_box_mrounds	Spawns primary fire ammo for the submachinegun
give item_ammo_crossbow	Spawns ammo for the crossbow
give item_ammo_357	Spawns ammo for the .357 magnum
give item_box_srounds	Spawns ammo for the 9mm pistol
give item_rpg_round OR give item_ml_grenade	Spawns grenades for the RPG
give item_ar2_grenade	Spawns grenades for the submachinegun, oddly enough..........
give item_ammo_ar2	Spawns primary fire ammo for the Overwatch Pulse Rifle
give item_box_buckshot	Spawns shells for the 12-gauge shotgun
give item_ammo_ar2_altfire	Spawns energy grenade for the Overwatch Pulse Rifle
mat_yuv 1	black-and-white mode
host_timescale #	Changes the speed of the game (for slow-mo/fast-mo) (# < 1 =" slower,"> 1 = faster).
ch_createairboat	Makes an airboat
ch_createjeep	Make a jeep
give item_suit	Gives you the HEV Suit
Kill	You die.
shake	Creates an earthquake.
r_screenoverlay effects/combine_binocoverlay.vmt	Gives you combine vision during gameplay.
r_screenoverlay effects/tp_eyefx/tp_eyefx.vmt	Gives you weird vision during gameplay.
cl_drawhud 0	Toggles HUD off.
cl_enablehud 0	Toggles HUD off.
mat_yuv 0	Enables Color Mode
item_healthkit	Gives you the large health kit (25HP)
item_healthvial	Gives you the small health vial (10HP)
sv_unlockedchapters # (Note: 15 is end credits)	Unlock chapters 1 thru #
physcannon_cone #	Changes the radius of the cone used to pick up objects
physcannon_tracelength #	Changes the length that objects can be pulled from
physcannon_maxmass #	Changes how large pulled objects can be
physcannon_pullforce #	Changes how quickly objects are pulled
physcannon_maxforce #	Changes how hard you propel objects
bind X "Impulse 101"	Creates a hot key for instant stock of weapnos and ammunition using the "x" key
d1_canals_01	Spawns you in the canals.
d1_town_01	Spawns you in Ravenholm
d1_trainstation_01	Spawns you in train station
d1_under_01	Spawns you in lab
d2_coast_01	Spawns you on the coast (Vehicle)
d2_prison_01	Spawns you in Nova Prospekt
d3_c17_01	Spawns you in the city 17 rebellion
d1_canals_02	Spawns you deeper in the canals.
d1_under_02	Spawns you in the lab chapter after the second load point.
d1_trainstation_05	Spawns in the train station after the third load point.
d1_trainstation_03	Spawns in the train station after the second load point.
d1_trainstation_02	Spawns you in train station after the first load point.
d1_town_05	Spawns you near the end of Ravenholm.
d1_town_04	Spawns you in Ravenholm after the third load point area.
d1_town_03	Spawns you in Ravenholm after the second load point area.
d1_town_02	Spawns you in Ravenholm after the first load point area.
d1_canals_end	Spawns you near the end of the canals.
d1_under_03	Spawns you in the lab chapter after the third load point.
d1_under_04	Spawn the lab chapter near the end.
d2_coast_02	Spawns you in the coast area after the first load point.
d2_coast_03	Spawns you in the coast area after the second load point.
d2_coast_04	Spawns you in the coast area after the third load point.
d2_coast_05	Spawns you in the coast area after the fourth load point.
d2_coast_06	Spawns you in the coast area after the fifth load point.
d2_coast_07	Spawns you in the coast area after the sixth load point.
d2_coast_08	Spawns you in the coast area near the end of it.
d2_prison_02	Spawns you in Nova Prospekt after the first load point.
d2_prison_03	Spawns you in Nova Prospekt after the second load point.
d2_prison_05	Spawns you in Nova Prospekt near the end of the level.
d2_prison_04	Spawns you in Nova Prospekt after the third load point.
d2_coast_09	Spawns you in the coast area after the eighth load point.
d2_coast_10	Spawns you in the coast area after the ninth load point.
d2_coast_11	Spawns you in the coast area after the tenth load point.
d2_coast_12	Spawns you near the end of the coast area.
d1_canals_03	Spawns in you in the canals after the second load point.
d1_canals_04	Spawns in you in the canals after the third load point.
d1_canals_05	Spawns in you in the canals after the fourth load point.
d1_canals_06	Spawns in you in the canals after the fifth load point.
d1_canals_07	Spawns in you in the canals after the sixth load point.
d1_canal_08	Spawns in you in the canals after the seventh load point.
d1_canal_09	Spawns in you in the canals after the eighth load point.
d1_canal_10	Spawns in you in the canals after the ninth load point.
d1_canals_11	Spawns in you in the canals after the tenth load point.
d1_canals_12	Spawns in you in the canals after the eleventh load point.
d1_canals_13	Spawns in you in the canals close to the end.
d3_c17_04	Spawns you in City 17 after the third load point.
d3_c17_03	Spawns you in City 17 after the second load point.
d3_c17_02	Spawns you in City 17 after the first load point.
d3_citadel_05	Spawns you at the end of the Citadel.
d3_citadel_04	Spawns you after the third load point in the Citadel.
d3_citadel_03	Spawns you after the second load point in the Citadel.
d3_citadel_02	Spawns you after the first load point in the Citadel.
d3_citadel_01	Spawns you near the beginning of the Citadel.
d2_prison_08	Spawns you near the end of Nova Prospekt.
d2_prison_07	Spawns you in Nova Prospekt after the sixth load point.
d2_prison_06	Spawns you in Nova Prospekt after the fifth load point.
d1_trainstation_06	Spawns you near the end of the train station.
d1_eli_02	Spawns you in Eli's Lab.
d1_eli_01	Spawns you after the canal, outside of Eli's Lab.
d3_c17_05	Spawns you in City 17 after the fourth load point.
d3_c17_06	Spawns you in City 17 after the fifth load point.
d3_c17_07	Spawns you in City 17 after the sixth load point.
d3_c17_08	Spawns you in City 17 after the seventh load point.
d3_c17_09	Spawns you in City 17 after the eighth load point.
d3_c17_10	Spawns you in City 17 after the ninth load point.
d3_c18_11	Spawns you in City 17 after the tenth load point.
credits	Starts you at the credits
intro	Starts you at the games Intro.
d1_breen_01	Spawns you at the beginning of Chapter 13.
d3_c17_13	Spawns you near the end of City 17.
d3_c17_12	Spawns you in City 17 after the eleventh load point.
item_dynamic_resupply	Fragmentation Grenade
weapon_annabelle	Father Annabelle Grigori's shotgun, uses 357 magnum ammo
0.05	slow
0.5	mid-slow
0.1	super-slow
0.0	stop time
map d3_citadel_04	Changes you to a level where you start with the super gravity gun
changelevel d1_trainstation_01	Switches you to the first level, replace d1_trainstation_01 with other map names if you want
give weapon_physcannon	Gives you the gravity gun again
stop	Stops recording the current demo.
record demo_name	Records a demo of all the user's actions within the game until the "stop" command is issued.
play demo_name	Plays demo.(change demo_name to the demo you want to be played)
give weapon_alyxgun	Gives you the 'Alyx Gun'
sk_plr_dmg_alyxgun #	# is new damage for Alyx Gun (default 150
sk_max_alyxgun #	# is new max ammo for Alyx Gun (default 0)
physcannon_megacannon 1	Makes your Gravity Gun a Super Gravity Gun