Um, I don't understand what you're trying to say...if you mean do you need to install Half-Life to play ESF v1.2 then no, not from the CD, but you NEED to install it with Steam and play for at least 1 minute. If you wanna play with WON then YES you need to install Half-Life from the CD and update it to the newest version (1.1.1.0.) I forgot where to get it though. Same thing applies to ESF v1.1.