What can you fit in 5KB (5120 bytes)? Maybe a short email to a friend, a small image of your fave model, or a maybe even a game. Waittaminitkapengmainit! A game?!? Yep you read right, the developers of Wolfstein 5k managed to cram the classic gameplay onto a measly 5k for the 5k contest. They even got a link on how to dissect the whole project. Pretty cool stuff, if you ask me.
Interested? Check out the official Wolfstein5k site.