We often see concept art for games that are coming out, but how about games that are already out? Like, say, The Legend of Zelda, which was released in 1986?
The latest in Nintendo's series of "Iwata Asks" is up on the company's British portal, and contains four rare, most likely never-before-seen (by you) pieces of concept art drawn up during the original Zelda's formative stages.
A world map, some pixel sketches, even a design outline, it's all below. Below, and hand-drawn.
zelda Handheld History [Nintendo]