v Lords submitted a new map: The Valley - This valley has the best Spartan hunting you can find anywhere! Read more about this map...
Well, I don't want to completely spoil it, but only the hunters can trigger it, and when triggered they fall from their tree stand and it sort of turns into them being hunted. As to how to trigger it, you need to shoot an explosive located outside of the map.
I think it may be a better idea to switch infected and survivor roles, since killing the hunter results in waiting for the next round. Unless there is another way to avoid this.
That's true, however, you cannot select how many starting survivors there can be in the game settings.