"Regent of the Dead" is a captivating side quest in Fallout 76, introduced as part of the Atlantic City expedition. This quest involves navigating a complex web of gang politics and alliances in the post-apocalyptic world. One of the key challenges players face is deciphering a mysterious keypad code to unlock a crucial door. Here's a comprehensive guide on how to find and use the keypad code, along with a walkthrough of the quest.

Starting the Quest
To begin the "Regent of the Dead" quest, players must visit the Whitesprings Refuge and interact with the Job Posting Board near Jeremiah Hopkins's desk. This will add the quest to the 'Side' section under the 'Data' menu in your Pip-Boy.
Quest Walkthrough
Travel to Atlantic City: Launch an Expedition from the map, selecting the Atlantic City > Casino Quarter option. Ensure you have completed the "Responders Reborn" quest to unlock Expeditions.
Meet Fabio Mondadori: Upon arrival, head to the Casino and speak with Fabio Mondadori. He will task you with dealing with a gang causing trouble for the mob. You can choose to intimidate, convince, or kill them based on your character's stats.
Investigate Concerta's Room: Proceed to the Neapolitan Casino and search Concerta's room for clues. You'll need to find five pieces of evidence:
Broken Mirror on the wall
Gift Box inside the open fridge
Stack of Books near the chair
Canister of Addictol on the floor inside the bathroom
Caged Candle on the table.
To enter the room, you can either use Lockpicking Skill (Level 3 required) or find the key in the basement.
Locate the Don's Office: After gathering all clues, interact with the piano to receive a "Change of Plans" note. Follow the quest marker to find the Don's office.
In Fallout 76, while navigating the "Regent of the Dead" quest, players also have the opportunity to earn significant rewards in Fallout 76 caps. These caps can be used to purchase essential equipment, materials, and even blueprints for unique armor pieces from various traders across the game world. As players progress through the quest and make strategic choices, the caps earned can substantially enhance their character's capabilities and progress in the game.
Deciphering the Keypad Code
Inside the Don's office, you'll encounter a keypad lock. The code can be deciphered by matching the first letters of a poem with corresponding numbers from tax records found on a nearby terminal. The code is 68492.
Alternative Method: If you prefer not to decipher the code manually, you can directly use 68492 to unlock the door.
Completing the Quest
After entering the code and accessing the secret room, you'll find a dead body and a death note. Upon exiting, you'll be confronted by Concerta. Your choices will determine the outcome of the quest and who leads the gangster family:
Side with Concerta and kill Fabio: Receive Civil Engineer stabilized armor arms plan.
Side with Concerta but let Fabio live: Receive Civil Engineer lead-lined armor limbs plan.
Side with Fabio and rat Concerta: Receive Civil Engineer lead-lined armor torso plan.
Kill Concerta: Receive Civil Engineer custom fitted armor legs plan.
Kill both Fabio and Concerta: Receive Civil Engineer brawling armor arms plan.
Let both Fabio and Concerta live (walk away): Receive Civil Engineer cushioned armor legs plan.
The "Regent of the Dead" quest in Fallout 76 offers a rich narrative with multiple outcomes based on player choices. By following this guide, you can navigate the quest's challenges, including deciphering the mysterious keypad code, and enjoy the rewards that come with each possible conclusion.