I enjoy a bit of Zombie Run! (Google maps with little zombies running towards you and you have to get to the location before they get you). And I also really enjoy SpecTrek where you shoot ghosts on the camera while walking around using the gps to find them. What if both were combined. Especially if you had ghosts and zombies coming towards you while trying to get away and shooting them and getting to the next destination? I think I'd love that! What do you think?