I remember the DS era when developers feel the need to use the touch-screen for almost anything: Navigating through menus, dragging, walking, shooting and more. That eventually lead to the DS's touch-screen to have several scratches, making the screen protectors more valuable. And more if you had a lot of games or a flashcart. Right now i'm struggling to find that kind of games but for 3DS, and the only one that i've played that left some scratches on my touch-screen is Severed. Other than that, the CirclePad is what's suffering the most. Have you encountered any Touch-torture game on 3DS?