it's definitely worth playing but unless you're a die hard god of war fan i'd suggest renting it.
it is the worst in the series.
anyway, kudos to santa monica for making a game as good as god of war 3 for their FIRST game on the ps3.
remember how much uncharted 2 improved on uncharted? i expect something similar from santa monica to be honest. really, for their first ps3 game, god of war 3 is spectacular effort even if it fall shorts of the lofty expectations.