1up.com has posted a preview of the PSP version of the abysmal 50 Cent: Bulletproof. The good news is that the PSP version is not a port of the console version. The PSP version is actually a top down hack-n-slash in the vein of Untold Legends as opposed to a 3D Shooter.
The game supports Ad-Hoc multiplayer with 6 players over 5 game types. The modes are Capture The Flag, Deathmatch, Deathmatch to pick up loot, King of the Hill, and a form of Assault where one team has to protect their cars from an opposing team intent on vehicular destruction.
Their conclusion is that this one may actually be worth playing when it is released this Winter, but read the full preview for more information.