Insanity III: The Voice Won't Leave Him Be

(Takes place after Insanity II's good ending!) Everything seems well concluded, nothing ever happening again. But no. It's not. A new voice has appeared in Gumball's head, supposedly the one telling him to kill people. With this new situation, Gumball tries desperately to end all this madness.. However, thing's are starting all over again. Will Gumball finally end this insanity?...