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.
You know how to use cheat engine right? tickets there should be no problem with cheat engine just remember that tickets is like 30+ addresses. And for money just kill zombies till u get up to 3000 in game points. Then go deposit 1000, go to cheat engine search 1000, go back deposit another 1000 and after that it shouild find one address you just change that one to 10,000 is what i do. then when u go to withdraw money its unlimited. only down side is withdrawing takes like 3 seconds.