Dead Frontier:
An totally free zombie survival mmorpg. Based on the popular Dead Frontier: Night 1/ 2/ 3 games,
the game has an active community with almost a thousand forum members and a comprehensive wiki. Its out go play it!

Zombie Survival Quiz:

An attempt to rate your survivability. Does this quiz have any validity? You be the judge.

Max Brooks Survival Chance Indicator:
On the website for the book World War Z there is a survival chance calculator much more accurate than the non-lame zombie survival test.

Urban Dead:
Urban Dead, developed by Kevan Davis, is a free low-tech, massively multi-player on-line roleplaying survival simulation game (MMORPG). It is set in a quarantined city called Malton, though believed to be an English city.

You sign up as one of four classes: civilian, scientist, military or, heaven forbid, zombie. Each of the three survivour classes is broken down further into subclasses. These subclasses dictate what skills you start out with. The game works on a system of Action Points (APs) and Experience Points (XPs).

1 AP is acquired every 30 minutes until you have a maximun of 50. In the game, all activities cost at least 1 AP, however some cost more. XPs are acquired by engaging in different activities eg, shooting zombies, healing wounded, reviving zombies or eating survivours. Again, different actions result in earning different XP. Once a certain number of XP has been accumulated, these can be exchanged for different skills. The cost of these skills varies depending on which class you chose to start your character.

Along with other players you try to survive. Barricade yourself in buildings and fight off the infection... or just join the ranks of the undead decimating all life in your path. This game takes about 2 weeks of solid play to get into but once you start playing it, you can become addicted.

Urban Dead also has an instance ofMediaWiki and lots of forums catering to the different roles the players in the game which to assume.

ZDay:
Z day is an online zombie survival FPS Game. (Also referred to as a "MMOFPS") You are placed into a city overrun by the infected aka zombies. The infected can run, faster than you can meaning you alone are no match for the strong fast infected! You can barricade doors, search for, collect and carry supplies, arm yourself and buddies up etc. Online play - only! Meet up, form search parties, use your survival instincts, teamwork is a must for survival, can you survive?

Zombie Infection Simulator:
Take charge of a tiny pixellated city on Z Day. Customize everything from the number of starting zombies to the attack efficiency of the military. Watch the city prevail against the menace, or get overrun. And it is up to you to make the choice of when to push 'The Button'.

Hardcore Pawn:
By far my favorite Z game site, includes nuke-dropping simulator and several quite fun top-down shooters.

ExanimusTheGame.com (MMO):
Exanimus is an online massively multiplayer online game created in a world where the dead live and roam the earth attacking the surviving living. While most of the world is dead, there are small pockets of survivors that exist in barricaded cities scattered across the planet. Players of Exanimus will have the option of playing as a living survivor or as on eht e dead roaming the earth. Exanimus will allow players to experience a new type of MMO based on the horror genre. Exanimus will feature challenging gameplay and visually "intense" environments.

TimeSplitters 2:
Great game for PS2 and tons of zombie levels. Music adds to the scariness,

Kill The Zombies!:
Over 100+ Online Zombie Games

The Last Stand and Last Stand 2:During the night, protect your barricade against the oncoming hordes. Manage your time during the daylight hours to search for weapons, survivors and to repair. Move with the WASD keys and aim/shoot with your mouse. Reload with the R key. Press space bar to switch weapons.

The Dead Awaken:Sign up for this free addictive zombie survival MMO! Train your skills and fight others for your survival. Join clans, explore buildings, watch zombie races (like a horserace, and yes, you can bet),and customizing your hideout is just the tip of the iceburg! the game also features chatrooms, ingame messaging, a marketplace, and game statistics.

Left 4 Dead:
Left 4 Dead is a new zombie survival game in which four survivors are immune to a new malevolent rabies virus. In order to escape you will need to rely heavily on teamwork. It is due for release Fall 2008 and will be available for the computer and X-Box 360.

Boxhead Series:
Play as a block-headed zombie killer in these hardcore but fun survival games. Hordes of zeds come for you, and as you advance in levels, your weapons become better and better.

INFECTION!:
In this free, Downloadable Zombie game, you play as the Zombie infecting hapless test subjects. Please rate the game once you've played it.

Lots Of Tests:
This site has lots of test for you to test your zombie survival skills.

www.Undeadgames.com:
This is a zombie community dedicated to all things zombie. Great source of zombie mods, games, books, movies, and generally anything relating to zombies. Stop by and check us out as we always welcome new members and like-minded individuals.

www.newgrounds.com/portal/view/425802:
A great zombie survival test on newgrounds. Lots of good questions, good scores, cool music. Warning: This test follows the max brooks "solanum" zombies, not the george romero "classic zombies" or 28 days infected.

Last Night On Earth:
Last Night on Earth, The Zombie Game is a fast-paced game of brain-eating Zombies, small town Heroes, and horror movie action. Players take on the role of either the Heroes, working together to make it through the night; or the Zombies, unending waves of undead spreading over the town like a plague. Featuring a modular board, eight Heroes to choose from, and several different Scenarios to play that drastically change the game. Last Night on Earth is designed to create a cinematic feel as the story and game unfolds. This is the game designer's description

Resident Evil: Am actually surprised this wasn't posted. The basic premis for those who do not know, is the realease of a viral agent from a secret Umbrella testing facility. While the creatures are not all zombies, the actual undead are much more difficult to defeat. Team them up with cross-species zombies, such as dogs and crows, making a harrowing adventure.