If you downloaded the folder to play classic mods like Cry of Fear , Poke646 , or old-school multiplayer maps, you must structure your folders correctly.
Purchase and download (the original 1998 version, not Half-Life: Source ). Half Life Valve Folder Download
The folder typically includes several gigabytes of data, primarily broken down into these categories: Wiki: Tutorial: Half-Life directories - TWHL If you downloaded the folder to play classic