I honestly have no idea, I've been playing games since a very young age lol. I remember starting off as a kid watching my brother play Wolfenstein 3D and Doom as a four year old, I loved watching hahaha. It never really scared me back then surprisingly. The first possible M rated game I played may have been Mortal Kombat for Sega Mega Drive or something on that game system. I'm not totally certain. That game used to give me the creeps at times but trust my brother to buy me something like that at a young age! XD