The most popular city building game of 2016 is now available for free on Google Play. This game is a real challenge for you because it will test your skills and abilities in an extremely realistic and challenging way. You will be required to build a bridge to connect two rivers. You will have to drive and maneuver heavy machinery to complete this challenging task. You will also have to make sure that the bridge is well built and is solid enough to support the weight of the vehicles and the river flow. You will be required to drive all kinds of heavy machinery to complete this task.