All you have to do is be one of the first people to register for the new site when it goes live on Friday. There's no word yet on what the beta will contain or when it will be released but the current site says, "Early registrations will be tracked, and our first wave of users will have a chance to win a key as and when the Crysis 2 beta takes place." People who register for the site in the first week will also get some extra perks like an exclusive wallpaper, an exclusive forum badge and a chance to win a Razer gaming mouse and mouse pad.
[Via Blue's News]
Gallery: Crysis 2 Screenshots