Worms Reloaded has finally extended its beta for a worldwide audience. Previously, this beta was only available for a small number of European users. However, Team17 has officially announced, in their Steam community we mentioned about previously, that they will be opening up beta for Steam users on Monday:-
Just a brief announcement to let you know that following the success of the limited Beta on Worms Reloaded (our new Worms game for Steam) we have decided to extend the Beta to a worldwide audience (previously Europe only) . However there are a limited number of Beta keys.
To enter into this beta, you need to join the official Steam community and await Monday with bated breath.