You know what would be good...

[Atomic Hamster]

...would be if they did this but had zombies instead of aliens. Oh no wait... :)

Just kidding, this looks awesome and really grateful it's free but I guess that Team17 aren't too happy lol.

I can see this being massive!

[Snausages]

people can make zombie mods
hell, maybe we can replace all the characters with the TF2 mercenaries if we want

valve wanted this to premiere after Team17's game, so yeah they might be pissed haha

[Bindal]

people can make zombie mods
hell, maybe we can replace all the characters with the L4D Survivors if we want
Alternative Version added. Bet, THAT replacement will be released earlier aswell :P