YouTube Uploaded Time: July 20, 2008 at 6:42 PM

Half-Life: Opposing Force - Worlds Collide (Part 2/2)
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Shepard goes into the deep part of Black Mesa where he confronts a large creature who came out from the portal. What ever it is, he has to defeat it to end numbers of Race X aliens from attacking again.

Comment and rate it. Thank you.
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This boss looks boring to defeat.