If you have Left 4 Dead 2 on Steam, you should search the Workshop for a campaign called DeathCraft. Be sure to get the other files, such as the reskins, and I guarantee you that you will have a blast.

We also uploaded footage of us playing it, so if you want to check ours out first and develop an opinion, give it a look!

http://www.youtube.com/watch?v=y7x2R5icYiE