So claim the creators:
These mosaics have been created using various sprites and screenshots from every single Legend of Zelda game ever made. This includes the infamous CDi games such as The Wand of Gamelon and classics like A Link to the Past and Ocarina of Time. Many of the images are from Legend of Zelda 1, 2 and 3, but all the games are represented.
Yeah yeah, whatever…nice, but there are a TON of apps that will do this for you. It’s seriously not “that” hard to pull off. I would be impressed if there wasn’t plenty of apps that “probably” used to make this pic.