"February 8 - General Spark falls at the Battle of Fremont, and we discover the plans for an ultimate weapon in his last will and testament. The CX4 unleashes quad extinction class homing rockets."
The Cataclysm X4, also known as the CX4, is a combination of a spread gun and a rocket launcher. To be more specific, it combines a Tetraspear and a RPB launcher, then adds a homing effect. It shoots 4 dark blue missiles one after another, which lock into enemies, and if the enemy they were on is destroyed, they re-lock. It comes to be better than The Apocalypse by each shot.