I don't know how to play the beta, I have made an acount on the website but I don't have a beta-key or something. how do I get one? I don't have the complete edition or something.

buying a complete edition for is the only way for now to obtain a key. some people will also be selected by ubisoft? and receive a key. but beta hasn't started yet so...

If you register in the mainpage of HoMM Kingdoms, you will have a chance to get a key

@Targ: Having the complete edition is not the only way to get into the beta, but the way to get it for sure

where is it based on if you are picked for the beta, how much posts you have posted? how active you are on the forum? or will they be randomly selected?

I don't know... Maybe they will have preference for the users that apport things to the forum and are active... but I don't know.