Great story, good combat system, right Deus Ex feel, but it isn't as complex as the first game
The story in invisible war is once again great, I mean there are fractions of the post Collapse (the Collapse has happened after the end of the first game) world and many characters from the first game. In the term of looks and physics, this game uses modified UE2 (first game used UE1) and Havoc2.0 physics so the looks of the game and physics are greatly improved. Combat system remains allmost the same, which means great news and this one is aswell very addictive. You just have to play it further to see, what is going to happen.
On the other hand this game falls behind becouse it is a direct Xbox port, which means a lot of things have been simplified. So there are no skills anymore, only basic biomoding, all the weapons use the same kind of ammo, goals menu is now very basic (codes are now automaticaly inserted where you need them, you can only see one goal per page...), also is inventory. Also becouse it's a port, Invisible war is a lot easier and a lot shorter than the original.
So, the game is worth to try if you are a fan of the original. And once again expect to look 10 minutes into a map wondering where would be the best entrance to fall into the building.