Dirty Bomb from Splash Damage (Brink, Batman: Arkham Origins' multiplayer mode) is entering open beta soon, though the date is still vague.
At the very end of a recent video from the team showcasing some new mechanics, Dirty Bomb's community manager Miss Murder said, "Should we tell them open beta's next month?"
If you're unfamiliar with the game, in Dirty Bomb players work together as part of a team of mercenaries who must enter an irradiated London to procure or destroy sensitive data. You can find out more about the game by heading here.
Announced with the title Dirty Bomb, for a brief period of time, the game's name was changed to Extraction, but then it went back to its original name.