Ooh, look what I found.
I like these first ones, they are definately L4D.
L4D
(http://home.btconnect.com/liberator/zombie01.gif)
(http://home.btconnect.com/liberator/zombie05.gif)
(http://home.btconnect.com/liberator/zombie06.gif)
(http://home.btconnect.com/liberator/zombie10.gif)
(http://home.btconnect.com/liberator/zombie11.gif)
(http://home.btconnect.com/liberator/zombie20.gif)
(http://home.btconnect.com/liberator/zombie02.gif)
Others
(http://home.btconnect.com/liberator/zombie03.gif)
(http://home.btconnect.com/liberator/zombie04.gif)
(http://home.btconnect.com/liberator/zombie07.gif)
(http://home.btconnect.com/liberator/zombie08.gif)
(http://home.btconnect.com/liberator/zombie09.gif)
(http://home.btconnect.com/liberator/zombie12.gif)
(http://home.btconnect.com/liberator/zombie13.gif)
(http://home.btconnect.com/liberator/zombie14.gif)
(http://home.btconnect.com/liberator/zombie15.gif)
(http://home.btconnect.com/liberator/zombie16.gif)
(http://home.btconnect.com/liberator/zombie17.gif)
(http://home.btconnect.com/liberator/zombie18.gif)
(http://home.btconnect.com/liberator/zombie19.gif)
Please add! :D