Also the easter egg alien boss kills u in one hit every now and then also. On bops 3 with misterys trainer we could Freeze zombie which woulkd freeze all zombies excluding bosses. Or we could disable zombie AI which was also very helpful. Another one they had was disable zombie damage so no zombie can damage you. I'm pretty good with cheat engine. As I sit now I can get unlimited money unlimited tickets and unlim ammo unlim health and unli grenades but im still getting downed by brutes and massive amounts of zombies.