Illuminati

The Illuminati is a secret society whose motives are unclear.

History
In 150,084 CMT (2014 on Earth), two Illuminati members, Dr. Wallace Breen and Zhao Yun Ru, ran a secret division of Project Cadmus that was responsible for the creation of a clone of Yon. When the clone was sedated and captured by unidentified individuals calling themselves "Harmony" and "HIM", Breen decided to terminate the clone by transmitting its killphrase in order to avoid its existence being traced back to them, despite Zhao's protests. Though Zhao stated that Cadmus could create another clone, Breen decided to exit the project due to dissatisfaction with Cadmus's management and the existence of other splinter factions. However, because Breen was being unclear about what he was quitting, Zhao warned him that "You might be able to quit Cadmus, but you can't quit the Illuminati", which prompted Breen to imply that he would unless the Illuminati gave him a position where he could have a public face again and be a true "representative to the people", which he had been lacking ever since Black Mesa shut down. Zhao merely replied "We'll be in touch".