Mad Town Online is a great open-source multiplayer shooter. At your disposal a large city, a huge selection of vehicles, such as cars, motorcycles, helicopters, bicycles, trucks, etc. You can get any kind of job, from the cleaner to the policeman. With the money you earn, you can buy a house or an apartment, as the game has a large selection of real estate. If you decide to go to the criminal side, then you have a huge selection of weapons, ranging from pistols to grenade launchers. And also you