Prelude of the Chambered by Notch 2011-08-22T16:11:00
It's honestly sick how productive Notch is. The game feels really Minecraftey, with the low-res graphics and all the punching - for obvious reasons, of course. But, the game is interesting enough to spend the time required to finish it, and plays off the theme well. Very impressive. I gave it 4/5 stars.