Getting a beta key from us is simple. Just email us at firstname.lastname@example.org with the subject line, "Dino D-Day Beta". We will give out the keys until we run out. If you are lucky enough to receive one you will have to have the Steam client and account to plug in the beta key. Once that's done the Steam client will download the beta and you should be all set. You can also head to the official Dino D-Day Steam community site for more info.
Our thanks to Dino D-Day's development team at 800 North for the beta keys. Good luck.
Gallery: Dino D-Day