What is the process of installing my retail copy of Left 4 Dead or Left 4 Dead 2 on my PC?
If you are using a Mac, you will not be able to install from the disc. Please double-click on the game in your Library list to begin downloading and installing the software.
First, make sure Steam is installed. Click here to: download and install the latest version of Steam.
Once Steam has been installed, please continue by following these directions:
Note:If you have previously registered your copy of Left 4 Dead to your computer, you will use the option Reinstall.
Locate the CD Key that came with your purchase and enter it here.
Note: Valve CD Keys do not include the number 1, number 0, or the letter O. If you see what looks like a one, use the letter i. If you see what appears to be a zero or the letter O, use the letter Q.
If desired, you may Print Receipt then click Next >.
Select any options you wish and click Next >.
Wait... Note: "Installing from disk..."