What's there to say? It's pretty much a perfect L4D style campaign. I did however, encounter a serious issue where the bots got stuck on this stairway after I jumped down to grab a bile jar, and they wouldn't teleport at all, had to kill them all to proceed into the elevator. Another oddity is that it shows the L4D1 survivors on the poster, prolly too lazy to change from a port :)

This is still one of my favorite campaigns. I think I discovered the secret to making the bot players get into that elevator. I had to press the button on the elevator. Then I had to stand beside the elevator and wait for the elevator doors to open. Standing in front of the elevator or walking far away from the elevator seems to confuse the bot players. They won't get into the elevator after I do that. The second map of this campaign is very difficult because I have to turn off an alarm. I am usually out of ammo by the time I open the door that starts the alarm. The ammo pile is in the Safe Room. I had to stand on top of that generator near the Safe Room, hop onto a ledge, and walk back into the Safe Room. That was the only way to get more ammo before that first panic event started. There are a lot of tight spaces in this campaign. It's easy to get trapped by a Spitter or a Tank. The Witch Maze is not extremely difficult to navigate. Fortunately, the direction of the maze doesn't change. You have to keep moving to the left. Sometimes there are no witches in the maze. The tight spaces make this campaign similar to Project Auburn 2.