Back in the 80's and early 90's 8-Bit was the standard for video game quality images. At the time it was considered advanced, and quite the achievement, but technology soon advanced and the low resolution look was discarded as an embarrassment. At some point in the last few years it has become a cool retro look that artists have explored ad nauseum. One such artist is Pablo Cialoni, who has created, "Pixel Superheroes: Heroic Bits."
Artist Robert Shane "Darth Maul vs. Aliens"
Artist Benjamin DeGuzman "NBC's Community Mashed-Up with Street Fighter"
By the way NBC's Community is currently on hiatus and at some point will come back on the air. When it does it would be a huge help to one of the best shows on television if you would encourage as many people as you can to tune in. If you haven't seen the show than make an effort, it's truly worth it.