I have a referral link here that will start you off with a free 7-day active skill booster, along with an unlimited supply of Recruit Assault Rifles. Just sign up for DUST-514 using the link below and enjoy!
If for any reason you want to try DUST-514's sister game, Eve Online, a massive PC MMORPG that has been around for 11 years, I have another referral link that will give you an extended 21-day free trial here: https://secure.eveonline.com/trial/?invc=8422b343-f849-4bd0-9404-515189ce7e8b&action=buddy
If you do decide to join up, I wish you a pleasant experience. The learning curve is a steep one, and if you need any help don't hesitate to reach out to the community; though you may want to do that on the official forums since this place is pretty dead. The community of New Eden (the DUST/EVE universe) is a very helpful place and you can learn a lot from your fellow players, as many of them have been around for a very long time.
Enjoy, and good luck!
PSN: Toonami3000 Steam ID: VForVincent91 3DS FC: 2595-0594-0557 *~See my profile for an extended 21-day Eve Online trial and exclusive gear for DUST-514!~*
Keep in mind that it's being superceded by a PC version and almost all previously-planned new content for the game has been cancelled.
That's not to say you can't have fun, but it's definitely been given a limited lifespan when it had been planned as a 10-year project at minimum. And there's still no real clarity on what will be carried over to the new Project Legion (which SHOULD have still been called DUST but CCP screwed that up somewhere along the way).