After you complete the quest "Bridge the Gap" you will enter Road's End and receive the quest "Armory Assault." Your goal here is to kill General Knoxx, enter the code to the Armory (Blue, Yellow, Cyan, Orange) and blow up the Armory. The only difficult part of this for some may be killing General Knoxx. The easiest way to defeat him is to use a highly corrosive weapon on him. Also, be sure to kill any medics that appear right away. They love to drop their healing turrets which heal Knoxx very quickly. After Knoxx is dead, the rest of the mission is self explanatory.
GLITCH WARNING: In order to avoid your game glitching and making the Armory permanently closed, you must do the following:
- Do not quit out of the game once you enter the elevator shaft. Wait until the Armory explodes and the credits are done to quit out.
- Don't have the quests "Super Marcus Sweep" or "It's Like Christmas" in your quest log.