Havent played a game this good in a long time. Havent completed it yet, but the first levels are VERY promising. The graphics are fantastic, lighting and overall physics are very realistic. The game might feel a bit like Crysis when in a shootout, but that feeling fades when you realise just how many ways there are to complete a simple mission. The stealth in the game is very thought through, but so is the AI of the enemies- if you hide in one place and move unseen to another place the enemies do not realise that you have moved, and will continue the assault on your previous location. The RPG elements are also nicely done, the inventory system is simple and easy to understand, so is the self agumentation menu for powering Adam up. The story itself also makes sense from the start, no confusing characters are introduced who often twist the plot so much that the player doesnt recognize any of them.
Gampleay wise, the controls for the Xbox (and PS3 I believe) might be confusing from start, and the inability to re-map the buttons can be quite of a pickle, but you pick up on them fast enough not to get yourself killed in the first few missions.
Overall, the game is a must buy, no matter if you are a Deus Ex fan, or a shooter enthusiast. The way the game is presented is appealing to any adventure/RPG/shooter fan out there. Definite five stars.