The Force Unleashed for PSP differs greatly from its home console counter-part. While the basic story is the same, corners have been cut. Meaning, almost all of the cutscenes that add depth to characters have been lost. Which is a real shame, considering those were the high point of the home console version. However, both the level design and gameplay are vastly different and far less tedious in this version. Even though they're visually less interesting.
Pros: As per usual for the franchise - fantastic OST and lore, great sound effects, fun to traverse, satisfying combat against non-melee enemies, surprisingly destructible environments, decently sized campaign and an added mode not found on the home console version, plenty of unlockables, New Game+, not as much focus on the QTEs
Cons: Unwieldy camera, framerate and other technical issues, some of the cutscenes that flesh out the characters are missing, tiresome melee-to-melee combat, weak QTEs, inconsistent voice acting