http://www.urbandead.com/index.htmlThis is a neat little low tech zombie survival MMORPG. At first glance it might look like crappy mmorpg due to its lack of graphics, however once you try it for about a week (or even a few days), you'll realize that this game is actually pretty good.
It's one of those games where every action you do uses up a point, which recover at a rate of 1 point/half hour (50 points max). This may sound retarded, but it actually provides balance for the game so that players cannot gain an unfair advantage over other players. This makes strategy a big factor. You have to decide if you want to spend your points killing other zombies (who are real players who may or may not be afk), or scavenging buildings for supplies (weapons, ammo, medkits). The big thing is that if you run out of points, you can no longer play until you recover, leaving you vulnerable to other players unless you are in a safe house.
The site's wiki has much more information, but this is a fun game that you can enjoy for like 10 minutes a day.