Im having a Halloween party....?

hey, im 15, and im having a halloween party in my back yard. we have a small woods behind our house, and a ton of free space with trails. im thinking of playing cops and robbers, manhunt, the usual, but i need some more ideas about what else besides running around games. because its gonna be till 11, and not on halloween, im thinking of having everyone wear black, so it will be easy to run around and everything, but i need some party games that would work. the age is 14-16 years old, and im inviting guys and girls.... anythoughts???