The first album released was The Second Stage Turbine Blade, the second part in the series, followed by the third, In Keeping Secrets of Silent Earth: 3, and the fourth, which is split into two volumes.
The first disc to be issued was The Second Stage Turbine Blade, part of a series that continued with In Keeping Secrets of Silent Earth: 3 as its third component, and then the fourth installment, divided into two separate volumes.