Prince of Persia: The Sands of Time was, by all accounts, pretty good. Hence the inevitable sequel, which boasts a new free-form fighting system and projectile attacks.
Old Princey has matured since last year, and now apparently has a "darker heart". Perhaps he's been chain smoking John Player Specials. Anyway, an immortal incarnation of Fate, called Dahaka, is hunting him down, so the Prince will need all his time-altering powers, as well as his new fighting skills, to save his own skin.