The problem with old cheat guides is that game updates often break them. A command that worked in version 1.0 might be disabled or different in the current Steam version. Users searching for "noclip upd" are looking for the that functions on the latest version of the game.
A: You are typing it in the main menu. You must be loaded into a map (e.g., d1_train1 ) for the GoldSource engine to recognize the noclip command. cry of fear noclip upd