Absolutely, without a doubt, Game of the Year
Human Revolution is a prequel to Deus Ex, but don't worry if you're uninitiated. There are a few things here and there in regards to the original game, but it's mostly standalone, showing the step before on the evolutionary path to the first game. In the game, you play as Adam Jensen, a man who is forcefully turned into an augmented human being in a world torn between the desire for augmentation and the desire to see it end. As you journey through the game, you begin to unravel a conspiracy that Human Revolution only scratches.
The game is amazing, to say the least, and carries the spirit of the original through and through. Where is takes away some options from the first, it gives you some. It also improves upon the graphical capabilities of the original. Where Deus Ex was behind the times in terms of look, Human Revolution is maybe only a step behind the best looking games today. The production design more than makes up for that, demonstrating a subtle Renaissance style art to this near-future world. This leads into the best thing about the game: it's environment. Deus Ex has always created a wonderfully rich atmosphere and world for you to explore, and that is no different here.
While this game does seem slightly smaller in terms of a real world to explore, what you can explore is absolutely huge. The city hubs, in particular, are extremely impressive. They're multi-layered and if you augment yourself right, you have the ability to traverse the tiers quickly. Exploring the world around you is half the fun. Finding shortcuts and hidden paths, listening to conversations, reading newspapers. These are all fascinating and immersive elements to the game and develop the kind of world we haven't seen since the original Deus Ex. Freedom in these areas also puts this game on a whole nother level, as you are not only challenged with how you tackle a mission, but the moral choices you make. Blackmail someone to get into a restricted area and it will come back to you. There are some strong decisions to be made, and the consequences can have game altering effects.
The gameplay itself is what any Deus Ex fan might expect. Alone, no one choice is particularily well designed. Shooting feels a bit off and to your disadvantage while conversations feel a little typical (although the speech aug adds some interesting twists). However, combined, it's like an awesome pizza with all the best toppings. Hacking this time around is a minigame that's a lot of fun and worth investing in hacking augs. In fact, pretty much every aug is fun to try out. The augs this time are creative and generally don't require any manual control, although the most fun ones do. There is an aug that lets you see through walls, break down weak walls to sneak attack baddies, and a landing system that allows you to safely land after jumping or falling from any height. These are all a lot of fun to use and experiment with.
There is so much to get into for this game that I could make a huge article out of it. However, I will just say that the game is worth the investment, probably the only single player game this year that I would argue is worth laying down all the money for. It's deep enough to warrant multiple play throughs and the story and characters are fantastic. If you're looking for something a little different, but an instant classic, look no further than Deus Ex: Human Revolution.