Half-Life 2 cheats and cheat codes for PC

Cheat mode:
To activate cheat mode, you have to start the game with the -console command 
line parameter. To do this, open Steam, go to your "Play Games" menu, and 
choose Half-Life 2. Right-click on the Half-Life 2 icon and select "Properties". 
Click the Launch Options button then type " -console" without the quotes.
Accept by clicking "Ok", then close. To run the game, double click on 
Half-Life 2. During the game play, hit the ~ (tilde) key to display the 
console window. Then, type "sv_cheats 1" and press ENTER. You can now 
type any of the cheat codes bellow at the console window.

Also, any code can be used as a command line parameter by prefixing it 
with the "-" character. 

If you downloaded your game from Steam, use the following cheat in single 
player mode:
Run the game with the -applaunch -dev -tconsole command line parameter.

Cheat code - Effect
+mlook - Enable mouse look
air_density XX - Change air density
buddha - Decrease your health
ch_createairboat  - Summon an airboat
ch_createjeep - Spawn a scout car
cl_drawhud <0 or 1> - Enable/disable HUD display
cl_enablehud <0 or 1> - Enable/disable HUD display
cl_phys_timescale <0.00-1.00> - Slow time; 1 is default
cl_ragdoll_collide 1 - Disable dead bodies going through each other
cl_showfps <0 or 1> - Enable/disable frame rate display
developer <0-2> - Enable/disable developer mode; 2 is verbose
dsp_explosion_effect_duration XX - Set length of explosion confusion
exec  - Execute script file
give  - Summon indicated item
god - Activate god mode (server only)
hud_quickhelp/text? 1 - Enable crosshairs
hurtme  - Hurt player
impulse 101 - Unlock all weapons
impulse 102 - Skulls
impulse 203 - Remove targeted object or person
impulse 82 - Summon a jeep
impulse 83 - Summon an air boat
map