Anno 2070 is a hybrid resource management, city building sim and RTS by Ubisoft. Using futuristic technology, you must build a city to complete various goals while balancing the favor of three factions.
The main campaign for Anno 2070 revolves around a rogue A.I. and the steps that you must take to protect your people while solving the puzzle of how to defeat it. The story is told through in game events as you complete quests, and through pre and post mission cutscenes. While story can be somewhat secondary in these types of games, I found it rather compelling and was definitely interested in what would happen next.
For the campaign mode, you will be designing your city so that you can complete certain goals given to you by one of three factions, which are representative of business, technology and environment. Towards later missions you will be balancing the needs of multiple factions, whose unique buildings or abilities you will need to complete your quests. Since your city is persistent through multiple levels, this can create some issues while you are planning. You may spend one whole mission optimizing your city for the tech faction, only to find out later that you will need high level buildings from the business faction to continue. Your cities are mostly built on islands, and square footage is at a premium, so this can be problematic. Luckily for the most part there is not much of a penalty for having to tear down a building to place something new in its place, but still you can find yourself having spent hours designing a city perfectly just to find out later you have to tear it down.
Game balance is done very well. You will need to provide your citizens with certain goods, depending on what faction they are from, and most of these goods can be manufactured in your buildings. You will need to balance your cash, power supply and ecobalance to complete each mission, and luckily there are generally ways to increase each if you are patient.
Graphics are top notch, as our sound effects and voice acting. A lot of effort was put into the creation of this game, and it shows.
After completing the main storyline, there is still plenty to accomplish. There are council votes which you can participate in, and will give you bonuses to certain factions. There are many scenarios to play through. The main story can take you upwards of 20 hours or more to complete, and if you still want more to do, more is available.
Overall, I would completely recommend Anno 2070. It has that one more turn mentality that can keep you hooked for hours at a time. There is so much to do even after the main campaign that you will definitely get your money's worth. Anno 2070 is highly polished, well balanced, and very, very entertaining.