Purge

"The Purge should only be activated as a last resort, if the inhabitants of the planet are not worthy."

- Santa in All or Nothing

The Purge is a device, located within a temple, that holds the ability to exterminate all sentient life on the planet Chorus, if the bearer of the Great Key deems the planet's inhabitants to be unworthy. The Purge was first mentioned by the alien A.I. Santa and later makes an on screen appearance in Great Destroyers.

Role in Plot
When Tucker, Caboose, Dr. Grey, Carolina, and Epsilon meet Santa, the A.I. informs them of the Purge and it's abilities. After Sharkface overhears them, however, he relays the information to Locus and Felix, who make it their goal to activate the Purge and complete their mission of eliminating the inhabitants of Chorus for Control. However, when Locus and Felix eventually make it to the Purge they're confronted by Washington and Carolina, who proceed to battle them. After the Freelancers reveal that their team have reactivated Crash Site Alpha's tractor beams, the tractor beams pull in the UNSC Tartarus towards the Purge, destroying it.