With many different ways to... Complete your objectives, Hitman: Blood Money has some very good replay value.
But personally, the absolute best thing about Hitman: Blood Money, is that you can literally shoot up the entire place, leaving nobody alive, or you can be as stealthy and undetectable as possible. Or, you can choose to kill people using the middle ground of the two extremes. I would definitely recommend to at least rent Hitman: Blood Money, but personally, if I were you I'd buy it.