I found some sites selling cd key of Portal 2 game. I am confused about the same regarding the purchase. First on valve I found a game purchase for the same which is an legal copy. How does this sites can sell a key for an commercial game. Are those keys proper to buy. I need some more detailed information on this games system requirement. I have a Intel Core i3 system without an graphic card support but with 2Gb ram running Windows 7. Will this game works on my system or not. Thanks.
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