Free Game: Shambles (A Zombie Killing FPS from the creator of Minecraft)
This little game came out of a game jam where teams sit down and develop small focused games in only a few days and Minecraft director/creator Notch is apparently a master because this was thrown together in only 7 days and its pretty fun and addicting. It reminds me of the old school Doom and Duke 3D era FPS games but this time its all about killing zombies and surviving. Give it a try! You can even play it in your browser!