I have not completed this game yet. I have completed 10/12 missions on PS2.Here is my review.
Gameplay
The Gameplay is very fun and easy to memorise. It is very simple, but effective. It makes sense and you can adapt it to your preferred preferences. This game gives you multiple ways and opportunities to take out your targets and it makes you think and feel like Agent 47.
Story
The story so far is very good and intriguing. I will not spoil anything but if you are a fan of the traditional Hitman/Agent 47 style, you will enjoy.
Missions
Most of the missions are flashbacks/remakes of Codename 47, but are even better. The new ones are incredibly fun to play and I enjoyed them very much.
However
You will sometimes be caught/have your cover blown for little to no reason. I once had my cover blown by running (while dressed as a chef) . Most times it is then necessary to shoot your way out of the situation. But this can be avoided by walking with nothing in your hand, in a straight line and not bumping into anyone. Guards are instantly suspicious if you walk into them and will keep an eye on you.
Graphics
This games graphics are very good. Occasionally someone will walk through a door, or through another person, but you have to remember this game is from 2004. That is to be expected.
Conclusion
Solid gameplay, excellent story, very fun gameplay but it's a little bit hard to stay undercover. 8.5/10