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.
Edit: after a quick google search, it looks like there were a grand total of 9 M-rated GBA games released, most of them being not very good ports of more popular console/PC games (though an exception apparetly goes to Max Payne, which managed to successfully convert the original third person shooter into an isometric game). Similarly, only 11 M-rated games were released on the DS, the best and most well known of them being Chinatown Wars.
I wish I could have all of them! Maybe some day...
I was never really interested in any Pokemon game after the first two gens. They just didn't feel like different enough games to me. So with GBA, I only grabbed the remakes of the first gen when they came out.
I can relate to that. Same story, but for Virtual Boy's NA Jack Bros. Way too expensive to get now, but I got it way back when and thought I was paying too much at the time!
It's a great game! And Treasure seemed to work in every graphical trick they could get out of the system. There's some impressive and chaotic graphics in that game.
Heyyy I just picked up a copy of Iridion 3D! I haven't played it much yet but love the 3D effect. Kind of a Starfox style shooter.
If I had to pick one game from your pile to pick up and play right now it'd probably be Sonic Advance. I played and re-played that game a TON, although I never actually beat it.
It's been on the list for a while, but there are just too many great games in the GBA library. It's difficult to track down every cart I want (cause I kinda want all of them)