It's been a while since the last update, but a release date has now been provided for the Imageepoch's PSP RPG Black Rock Shooter: The Game. The game will be released solely through PSN in the US on April 23, with the European release following straight after on April 24.
Unfortunately, some countries will be missing out due to licensing and copyright issues surrounding the title. Those places that will not see a release on either of the previously mentioned dates are Canada, Mexico, and certain, currently unspecified European nations. The game will cost $19.99 (pricing in Europe is currently unconfirmed), and should be compatible with the PlayStation Vita. Two recently released trailers can be viewed below.