This campaign has a bug that causes the rescue to arrive instantly on the last level, making the horde and infinite tanks appear. It wouldn't be so bad if it didn't carry over to other maps; the same thing happens in all of them. If it's a chapter where you have to fill cans, you won't be able to win. I also noticed that during horde events, zombies barely appear, the roller coaster and stadium entrance become ridiculously easy in Dark Carnival. This had happened to me before, and I thought it was a coincidence. So when it was fixed, I replayed the last chapter of Dark Wood and it happened again, so it's this map's fault.