A puppet on purple strings {Possessed Gregory AU||FNAF}

Nobody is making anything like this so I will. (The actual description):

Gregory ends up finding himself stuck in Vanny's room, chased in by Chica trying to catch him. He finds an arcade cabinet. Similar to the others he found throughout the pizzaplex. After beating the final arcade game, it turns off, nothing seems off. Up until... he feels something or someone taking over his mind. Where will this go? I wonder.