Build-a-lot 4: Power Source - addictive and very interesting game, which is hard to break away for tablets android. In this amazing game you have to build a city, but not just a city, and ecologically clean city, and for that you will have to use alternative sources of energy such as wind, solar and nuclear power plants, to build additional units to keep the power supply system in good condition. Follow strictly planned, carefully using resources. Build environmentally friendly shops, bike paths and much more, to take the status of the most pure and high-tech city. Go 4 main campaign with 68 different levels.