Time to dust off your PSP emulators, folks.
Following a livestream with Saints Row developer Volition Software, the previously-cancelled title, Saints Row: Undercover, has now been made available as a free download.
According to Unseen64 (via. Polygon), where you can download the unfinished prototype version, the portable project is fully compatible on a PSP emulator, and had reached advanced development before cancellation by publisher THQ.
Volition recently released a documentary covering the mysterious title, originally dubbed Saints Row: The Fall, and since have published a number of PDF documents containing the features you can expect to find, as well as a brief walkthrough for those eager to rev up their PSP emulators.