The history of video games is built on pixel art classics like Super Mario Bros., Super Metroid, and Final Fantasy VI, but the graphical medium has made its way back to the forefront of gaming ...

Thus, hydroponic plants in varying shades are grown on each face, and when put together, modules can create changeable “pixel” art.

If you fancy perusing some lovely unofficial pixel art for the Metroid franchise, then you're in luck. Retro Game Books is currently offering the Pixel Art: Metroid eBook for absolutely nothing.