First idea is Music. It works like in This game Named Space Beast terror Fright.The closer he is.the intenser music gets. Second idea.A new item.Trapper.Stuns the Npc for a bit however if you werer noticed and he got trapped.he will forget that he saw you. Third idea.Obitirator.(uses Gravity gun model) Oneshots Terminator.However will cost 500.and is one time use.also has aim bot.4 Last idea.Sniffer.Is an Terminator dog that Helps him find you.No longer Cheating and hiding Somewhere where he could get he will now get there.however he appers only Whem time is at 5:00.to make it fair. of course.Bonus-Nightmare Diffuculty-Everything costs more.Terrminator can be stunned but he will know that he saw you.Terminators and other any spawned somehow npcs are more aggresive.Oblitirator only deals half of the damage to the Terminators in Nightmare mode.and doesnt has aimbot so good luck shooting him >:)