Everything that has an end, has a beginning...
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I own a legal version of steam run portal. I got it during the month when they offered it free, In March, I think.
But I installed Portal:Prelude, And whenever I try to run it, It says I need the source game, Which I own.
Am I missing something here?
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You are missing the website frontpage.
http://www.portalprelude.com
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