Extraction is now known as Dirty Bomb, which was the game's name when it was first announced in 2012.
According to the press release, the game’s back to being called Dirty Bomb as it "better reflects its personality," and also "ensures there's a single, consistent name across the globe."
Splash Damage promises this will “almost definitely” be the last name change before launch.
Nexon also has announced it will run dedicated servers for Dirty Bomb in North America, Europe, Australia and New Zealand.
The free-to-play and "free-to-win" Dirty Bomb is currently in a limited closed beta and you can sign up for future beta access through here.