A free app for Android, by Grand Game.

This is Mad Town Online, the open-source multiplayer shooter. Yes, you can steal cars, buy houses, rob banks, and more. You can also form a gang with six members so you can earn more money and seize control points faster.

But be careful, there is a very dangerous enemy in this world, the police, special forces, and a helicopter. They will try to stop you and they will shoot you and your friends. This is a huge open world, full of traffic and people. In this world, you can perform many different missions.