Either extract the files from the modification's .rar or .zip file to your Half-Life folder within your Steam directory, or just run the installer.i know there is other mods beside esf but i dont even have esf yet but just for future refrence how do i make a mod work on half-life1
You can actually find out what you CD-Key is if you installed non-Steam Half-Life, though it involves searching through your registry.ok thanks i only asked this cause i need a damn cd key cuz i lost mine so i ant play esf even though i have half-life instaled alredy