Cheat Mode:
Open Steam, go to your "Play Games" menu, and select Half-Life 2: Episode One. Right click on it and select "Properties". Click the "Launch Options" button then type -console. Click "Ok", then close. Double click "Half-Life 2: Episode One" to start the game. Once it is loaded and you are playing, press ~ to display the console window. Then, enter sv_cheats 1 and press [Enter] to enable cheat mode. You can now enter the following codes at the console window. Also, any code can be used as a command line parameter by prefixing it with the "-" character. Note: For games that were downloaded from Steam, to use cheats in single player mode, start the game with the -applaunch -dev -tconsole command line parameter.
Effect - Code
God mode (server only) - god
Spawn indicated item - give
-
Reduce your health - buddha
Damage player - hurtme
All weapons - impulse 101
Ignored by NPCs - notarget
Walk through objects (server only) - noclip
List maps - maps
Load indicated map - map