You know now that I think about it, I wonder how many M-rated games were released on the Game Boy/DS systems. I know some of the obvious ones would be id Software ports (like the Wolfenstein 3D seen in the picture) and the GTA games (both the GBA one from the mid 00s and Chinatown Wars from later), but other than those I can’t imagine the list is a very large one, especially considering most of the people who would have been playing on those systems at the time would have been kids and teens.