With this key code you are able to download and install and play following games:

Counter Strike 1.6

Day of Defeat

Half-Life

Half-Life:Blue Shift

And more available games listed on the screenshort bellow:
 

All key codes are scratched out from retail boxes.
100% un-used legal key 

You will need a new steam account to bind this cd key.
One cd key can only be used once to activate one steam account.
Once your steam account is activated by the key codes, you are able to download games right away from official site through your steam account directly. 

Steam website: http://www.steampowered.com/v/index.php?area=getsteamnow

About Delivery: (***important***) 

Step 1: Please creat a new steam account.
If you don't have steam accounts, just download steam client from official site. And then register a steam account. It's free, you can make multiple accounts if you like.

Step 2: Tell us your account information via order comment or email(nakamura177@gmail.com). We will bind the cd key onto your steam account after payment recieved in 24 hours. Then you will recieve an notification email from us including the key codes used on your account.

Step 3: change your password, and start playing. 

Delivery Time: Due to the time zones difference, we can't guarantee instant delivery 24 hours a day. So guaranteed deliver time is in 12-24 hours. And instant delivery to most orders.

(Note: WE will never ask for your password again after delivery is done)