The world sits on the brink of Armageddon, since Weapons of Mass Destruction (WMD) are so wide-spread throughout the world's nations.
The Strategic Defense Initiative, or Star Wars, became a shibboleth for Reagan, the believer in Armageddon.
(See Antichrist.) From the application of the word Armageddon to the great battle of the End of Time comes the use of the phrase "an Armageddon" to express any great slaughter or final conflict.
Armageddon is designed to tie up all the loose ends, and, as it name implies, is "the end."
Worms Armageddon pits teams of worms against each other in all out combat, where the last worm standing wins.