Hello, I want to purchase the PC version of the Portal 2 game. I need to install this game on multiple PC’s. Then I had decided to purchase the setup CD of this game rather than downloading its setup files. So, mine query is can this is possible to install this game on multiple PC’s using only one setup CD. I never know about the activation key of this game. Please tell me about where is the activation key present in this game setup CD. Any help will be appreciates.
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