I replaced one of the swamp monuments with the Kirran & Lifa - Swamp Zombie Home for the month of October and my players loved it. This custom monument has 3 puzzles, one for each keycard (green, blue, and red), that increase in difficulty. The attention to detail of the monument itself makes it a great attraction for maps looking to create a horror theme. It was also very simple to install and required minimal editing (especially if you replace an existing swamp). 

I added some custom NPCs using BotReSpawn for added difficulty.

This was a really great addon prefab to add to my Halloween Event map. Nice spooky vibes and a lot of fun stuff to do. Excellent work!