Genuine Product Activation / License Key. Same Day Digital Delivery. Download link & activation instructions will be provided. OWN THIS ITEM TODAY. THE NEXT INSTALLMENT OF THE WORLD'S # 1 ONLINE ACTION GAME Counter-Strike: Source blends Counter-Strike's award-winning teamplay action with the advanced technology of Source™ technology. Featuring state of the art graphics, all new sounds, and introducing physics, Counter-Strike: Source is a must-have for every action gamer.