Bungie's flagship first person shooter Halo 3 will be available tomorrow May the 16th in beta form.  Owners of Crackdown will be able to download it via Microsoft's Live Marketplace for free.

Here is what will be with the beta:

When gamers gather online to play the multiplayer beta via Xbox LIVE in May, they will be treated to three richly detailed, action-oriented maps: Snowbound, High Ground and Valhalla, which represent a mixture of large- and medium-scale combat environments and are brand-new to "Halo 3." Each map will test gamers' mettle as they are placed behind the controls of new "Halo 3" vehicles such as the agile Mongoose all-terrain vehicle, and armed with deadly weapons such as the new and improved Assault Rifle, the ferocious Brute Spiker, the devastating Spartan Laser and the treacherous new Spike Grenades. This is just a taste of what gamers will experience later this fall when "Halo 3" goes on sale.

Gamers worldwide who did not participate in the "Rule of Three" promotion but are interested in joining the multiplayer beta of "Halo 3" can still participate through the purchase of the critically acclaimed Xbox 360 title "Crackdown," which was launched in February. Each copy of "Crackdown" has been specially marked with a "Halo 3" beta sticker prior to the beta period, and starting May 16 the game will act as a key for gamers to download and participate in the "Halo 3" multiplayer beta.

The website can be found at Halo 3. I'll see you all online!