Games where the main character ends up being the mastermind/main culprit are so funny bc it’s like:
You are the mastermind but actually it’s you from the future. Also you are in the future and in your 67 year old body, but your conscious was from when you were in college. You didn’t recognize the older you and thought that everyone’s calling your grandpa just to be rude.
You are the mastermind because you were so distraught that you agreed to undergo a procedure to revive someone using your body. So you and your body are kinda evil but also your consciousness before this happened is still there and refuses to be evil. You didn’t know about the surgery because you had amnesia.
You weren’t the culprit but the guy that was swapped bodies with you. So your current body has done horrible things and now the guy is running around in your original body doing horrible things. You didn’t know that the body wasn’t originally yours because you had amnesia. 
