A Minecraft prison server is a server that runs a special type of game that differs from traditional Minecraft. In this mode, the game assigns players to roles as prisoners or as optional guards and must earn money to increase their ranks without being caught by any guards.
Unlike traditional Minecraft, prison servers do not feature any kind of wilderness environments that allow players to build their own structures. Instead, the prison variant focuses extensively on mining for ore and mineral. The ultimate goal of a prison server is to complete enough jobs for a prisoner player to earn his freedom and leave the prison, but in keeping with Minecraft's open-world style, players can continue to visit the prison to complete jobs and increase their standing on the server.