The aliens have won, or so they thought.System-integrated aliens, arriving onto the Dungeon World that is Earth, have taken control over multiple Canadian cities. Their greater knowledge of the System, their higher Levels make them believe they have full control.But humanity refuses to be chained, and John Lee has rescued one city. What's a few more?Cities in Chains begins the second arc of the System Apocalypse universe, where John Lee and his friends begin the long process of freeing Earth from the control of interstellar invaders. A post-apocalyptic LitRPG, the bestselling System Apocalypse series is twelve books long.