Hey guys, found a new campaign called Crescendo Collision, its all (or most) of the crescendos from l4d1 and l4d2 mashed up together in 1 campaign, so nothing but hordes and hordes! :P
Get the map here: http://www.l4dmaps.com/details.php?file=8611
Comment on this if you wonna play

Feel free to post an anouncement if you're hosting a map or if you want someone to host
Invite all your custom map friends! :)