Rockstar's sales team in the US has seemingly let slip the release date of the as-yet untitled GTA offering for Sony�s PlayStation Portable, giving the game an April 15 release date.

The date is for the US only and now resides on various American retail and games sites as a permanent fixture, good news for Sony as it struggles to furnish its wonderful debut handheld with quality, must-have software.

Nothing is known of PSP Grand Theft Auto, other than it will be set in Liberty City and will follow on in the free-roaming third-person 3D styles of the last three offerings.

The release date, however, is always subject to change.

Thanks to GTASanAn.com and SPOnG for the heads up.