The PSP hasn't had all that many major PSP-exclusive titles launch for it in recent months, but Sony has high hopes for the PSP version of its hit PS3 series,
Because the PSP lacks a second analog stick that would really help with aiming, Sony's touting the game's "advanced third-person targeting system designed specifically for the PSP system." However, the highlight of Resistance: Retribution is its robust eight-player multiplayer mode with five game modes (Team Deathmatch, Capture the Flag, Containment and Assimilation).
We've been playing with an early release of the final version and, all in all, we're finding it pretty fun, though the advanced-targeting system does make killing computer foes a little too easy at times, so you'll probably want to ratchet up the gameplay setting to hard in the single-player campaign mode.
Sample screenshots are below.