We've taken a lot of feedback from the community and have already fixed maps 2, 3 and 4. We've even managed to get it working in VPK format and have reduced the size of the campaign to around 700mb already. (Our mistake was forgetting all the useless junk that gathered over the years).
Furthermore, we've also changed many of the gameplay events and added more hint systems to help those finding it hard to figure out where to go and what to do.
Over the next few weeks, we're going to keep working on the campaign until we've fixed as much as we can or as much as we can find. For those who still want to play this campaign, in a working fashion, we're sticking to our word to get it out and working.
We will first release it for Left 4 Dead 1 but it will still contain many of the Left 4 Dead 2 features we already implemented (Find the Beer, Gauntlet events and the finale - Dead Center finale was the DBD finale. We changed that a bit now).
That's all for now. We will post the campaign on www.L4DMods.com when it's ready for download. Other than that, there won't be any updates until release day. Thanks to those for your ongoing support. We hope that we can bring you the campaign you expected from us.
Here's a little comic drawing for you guys: