The thing that killed it for me is that they introduced boring human-killing element to it (like all the other action games), where in number 1 it was all gorillas and tigers - now THATS action!
You kill approx 12 animals during this one and a whole lot of people, But the monster killing is the most fun, the sea serpent stumped me tho. Graphics is excellent and gameplay is fun.
I concur on it being a bit short.