Half-Life: Poke646

Half-Life: Poke646 cheat codes: 
Load game with the command line: hl.exe -dev -toconsole.
Then, press ~ if the orange text on the screen does not
disappear.
During gameplay, press ~ to display the text prompt and
type in sv_cheats 1. Press ~ and enter one of the following cheat.

Result                              Code
God mode                           - god
All weapons; press [Up] + [Enter]  - impulse 101
No clipping mode                   - noclip