Considering how ubiquitous and iconic the Game Boy had become over its roughly 15-year reign over the handheld gaming scene, the pressure was on Nintendo when it came time to launch a successor. How did Nintendo respond to that pressure? By following up the Game Boy with a family of handhelds that was even more successful, naturally. The Nintendo DS, with its novel dual-screen design, touchscreen controls, and N64-quality 3D visuals, burst onto the scene in 2004. It didn't take too long for...