what i'd do: go to google or yahoo, considering you asked the question on here we all know you have internet, search up the game name and put "reviews" on the end, look at the various reviews, i myself haven't even heard of this game, and with my friends, well that's odd, (says a lot that no one's said anything) when you're done, make sure that you find at least one review from a site called. "cnet.com" or "download.com" i trust that site very much (they're just about the same site, i think they are) in fact i'll find them for you:
http://reviews.cnet.com/playstation-2-games/kingdom-hearts-re-chain/4505-9581_7-33302505.html?tag=mncol;lst
that review is from cnet, they seem to be sister companies, but download.com seems to just cover downloading things, (demos and purchased/free versions of downloadable games that they have)
just keep looking at reviews, see what others think, also you may not have the same opinions as reviewers, so maybe search up similar games you've played, maybe other kingdom hearts, and see how they compare to your views, use that as a base.
(and btw, she said she hadn't opened it, to previous answerer)