The original development codename for the Xbox 360 console was Xenon.
Microsoft used Xenon during the console's development before choosing the retail name Xbox 360. The system was the successor to the original Xbox and was designed around a custom IBM PowerPC-based processor and a graphics processor developed with ATI.
Xbox 360 launched in November 2005 and introduced a redesigned user interface, a stronger focus on Xbox Live, and a wireless controller as standard equipment. Its name signaled a new generation rather than a simple numerical sequel.
Durango was a development name associated with Xbox One, while Scorpio referred to the more powerful Xbox One X project. These names are often mixed up because Microsoft used several geographic and astronomical codenames across console generations.