Not bad. Me and my friends hang out right in front of the waterslide. We leave the door to the beginning that connects to the maze/muddy area closed at all cost (I think you did too), as it cuts the number of zombies coming through the maze/muddy area towards the waterslide down quite a bit. One person on the window, another on the broken wall to the right of the waterslide, and the other two controlling the zombies coming from the maze area. When shit gets too hectic and you are about to be overrun, everyone hits the waterslide, goes down, and heads left towards the power area. From power, head towards the waterfall pool area, up the tunnel, across the wooden bridge, through the maze area back to the waterslide. REPEAT. This strategy works with 2-4 people, you just have to bail out sooner as you get overrun quicker with less people (less camping and more being on the move). Made it to 27 the other night and had to end it (I had to go to work). Could easily be used past 30-40. I really like this map. Its just fun to play a zombie map that isn't dark and decrepit but sunny. I've given up playing Call of the Dead as every game seems to end in some stupid server error (at round 28-29). Cheers, dj