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I wanted to ask a question about the Combine and the story-line.
Was there any reference at all, hidden or not, to the Combine in Half-Life 1?
I cannot find any relation and it makes me think that Valve made the Combine without planning to first. As in, they never had the idea for the Combine until Half-Life 1 was already released.
Otherwise surely they would have put some kind of reference in Half-Life 1.