Half-Life Sven Co-op [cheats]
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 console commands to activate the corresponding cheat function. Note: You can only use cheats when the maximum players is set to "2".
Effect / Code
Toggle God mode godmode [0 or 1]
All weapons giveall
Toggle no clipping mode cl_noclip [0 or 1]
Toggle opponents ignore character cl_notarget [0 or 1]