City of God I: Prison Empire is a prison themed RPG simulation game. Build your prison freely and make prisoners work for you with maximum efficiency by providing all kinds of prison facilities. Build different kinds of workshops to keep your prisoners working hard and earning money from the market. Find the specially skilled prisoners from the government and police database, and make those people work in your prison. Work as the warden to unlock different projects. Time your selling at the right time at the market. Make more money to expand your prison empire and use money to influence politicians and gangs in the city.

"Hey, son, I am the Deputy Mayor of Crist City. My secretary should have told you the position purchasing price of the warden of Pompii prison, right? Come on, son, make up your mind! There are a lot of people competing for this position, I don't have time and paticence wasting on you! Don't be shilly-shally, boy!"

In 1984, Crist City passed the law about the private prison. According to the law, the government should “sell” the prison to the company which offers the highest price. At the end of 1994, you became a warden of The Pompeii Prison which is located in Black Cloud district. As a warden of a private prison, your responsibilities include making plans about the whole prison and solving inmates’ all kinds of problems such as power supply, waste disposal and prisoners’ need for food, water and accommodation. As a matter of course, the prisoners are concerned about these problems. If the warden doesn’t provide leisure facilities, some prisoners may not focus on their work or even cause terrible acts which lead to riots, jailbreaks or suicides.