That should solve your problem. If you still have to register your CD-Key via Steam, you could not have done this.FAQ said:I have all the right requirements to play ESF, but the install button is greyed out! Help!
You need to have run Half-Life at least once before you try to install ESF. To do this simply start a single player mission. You may exit the game once it has loaded up. After you have done this, you should install ESF.
FAQ said:Ok, so I need a valid Half-Life or Counter-Strike CD-Key. Where can I get one?
You need to buy the game(s).
i have read the FAQ like i said. i did buy the game so im guessing some tard has stolen itPain said:If your CD-Key is in use it means someone either stole it from you, or you didn't actually buy the game.
Again, if you had actually read the FAQ, you would already know this.