Here‘s a very interesting article on GameInformer.com about Irrational’s Division 9, made years ahead of Left 4 Dead, but sadly never released, watch the trailer on the second page and cry.
rrational’s Division 9, made years ahead of Left 4 Dead, but sadly never released 
http://tinyurl.com/yha37fh trailer on page 2.
http://tinyurl.com/yha37fh trailer on page 2.
