A quick analysis and explanation why the Cold Stream campaign of L4D2 is bad.

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Useful links for more information on Cold Stream:

http://www.l4d.com/coldstream/
http://www.l4d.com/blog/post.php?id=5019
http://www.l4d.com/blog/post.php?id=5150
http://www.l4d.com/blog/post.php?id=8309
https://left4dead.fandom.com/wiki/Col...