My primary pixel art skill is making true retro style graphics, emulating the looks of old consoles, like GBA, NES, SNES, and ZX-Spectrum. I completed a great deal of projects with independent developers, and even have a small game development experience of my own.
This is by far not the complete scope of my pixel art projects, but considering the specifics of videogame asset design, a lot of the work pieces wouldn't work very well in a portfolio.