This is the news I was dreaming of. I didn't get as much time as I would have liked with the Destiny Alpha thanks to my 'wife' and my 'child' and my 'responsibilities', so news that Bungie is extending it is the best news.
There's a rumor that the #Destiny Alpha might be extended to allow dangerous experiments. Play beyond the official close at your own risk!
— Bungie (@Bungie) June 16, 2014
So if you were one of the lucky ones with a code, time to keep playing!