Game jams are fantastic for short, focused games. Couple that with Notch's ability to make polished gems for jams, and what you get is Shambles—an FPS zombie game developed for the 7DFPS challenge.
Yeah, another zombie game. Fortunately, this one is pretty good! You can play it in your browser here, or download it here. Some tips: civilians drop health, soldiers don't shoot you but they do drop ammo if you kill them. Now go see how high a score you can get.
(Via Indie Games)