On each level of the city, players draw on a range of suggested elements to describe the journey of their machines. They must find a way to defeat or evade powerful enemies who seek to block their progress.
As exploration of the city continues, the machines experience more memory fragments, enabling them to restore their ancillary features and grow more powerful. Players may also choose to reveal their machine's primary function to access a specified benefit.
If they are successful in their task, the machines face an important decision when they reach the apex of the city. Options are also included for machines who choose to explore the world outside the city.