Board Thread:Dark Souls II/@comment-5264386-20130801122019/@comment-5264386-20130823233740

Update #4: There will be a closed beta for Dark Souls II, which will be exclusively on the PS3, on October 5th. It appears that you'll have to watch their Facebook page to get a chance to enter. Also: Starting September 5, Namco will be flooding the Dark Souls II Facebook with news and updates about registration, not to mention additional information about the game.

As a result, there probably won't be a beta test for 360 or PC users. Grumble, grumble... >.<

Source
http://www.neoseeker.com/news/23696-dark-souls-2-closed-beta-hits-ps3-in-october-2013-watch-facebook-for-a-chance-to-get-in/