Dead Frontier

Main website:
http://www.deadfrontier.com

Night 1:
http://www.deadfrontier.com/nightone.php

Night 2:
http://www.deadfrontier.com/nighttwo.php

Night 3:
http://www.deadfrontier.com/nightthree.php

The zombie mini games are just a demonstration of an upcoming free Zombie MMORPG which is planned to be released in the first half of 2008.
If they final game is as action packed as the mini games, it's destined to rock your browser.
I think night 3 is by far the best of the trilogy. The whole idea reminds me a lot of the upcoming Left 4 Dead, another awesome zombie survival game.

Sad but true: There was a pretty bad glitch for me in the first night minigame, where after a while I couldn't control the mouse cursor the way I wanted to. Maybe it's a feature that shows just how paralyzed you are once you've been bitten? ;)