I'm going to install Portal 2 over the weekend. I'm not entirely sure how the co-op works. Should I play the game single player first and then play co-op or co-op from the start?

Wow, thank you very much for Portal 2, Viper! :D That's very kind of you. Hehe my wife was playing when she got the message about the gift. She says thank you too! :)

Good to see you on here. :) Thanks for the request.

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