Apparatuses and systems including a gaming machine having one or more major components that are removable and interchangeable with other similar major components for a gaming machine are disclosed. Such a gaming machine has at least a master gaming controller, one or more major components, and a universal gaming engine. At least one major component, such as a top box or main cabinet, contains a plurality of peripheral devices and a universal communication interface, is adapted to be removable from the gaming machine, and is interchangeable with other similar major components. The universal gaming engine contains at least one dedicated processing unit, such as a CPU, at least one associated storage device, and its own universal communication interface. This universal gaming engine is also adapted to control a substantial portion of the plurality of peripheral devices on the removable and interchangeable major component of the gaming machine.