A challenge rang out in Nintendo's offices sometime around 20 years ago. The Zelda series' third installment, A Link to the Past, had been an incredible hit for the SNES -- but could that same 16-bit success be replicated on the much less powerful, monochromatic Game Boy? The designers of the day took to the task and triumphed, crafting the fourth Legend of Zelda adventure and the first ever made for a portable system, Link's Awakening...