Start the game with the following command line parameter:
hl.exe -dev -toconsole.
Hit ~ (tilde) if the orange text on the screen doesn't disappear.
During the game play, hit ~ (tilde) to bring up the text prompt and
type in "sv_cheats 1".
After that, hit ~ again, and type any of the following cheat codes:
Result - Code
Enable god mode - godmode [0 or 1]
All weapons available - giveall
Enable/disable no clipping mode - cl_noclip [0 or 1]
Opponents ignore character - cl_notarget [0 or 1]
Need more cheats? Check the Trainers section for
Half-Life Sven Co-op cheats
Latest cheat codes for Half-Life Sven Co-op at Cheatserver.com