The RPG Citadel Protocol Book 4 - The Drowned Line: A Gritty Dungeon LitRPG Adventure

By Craig Zerf and Sasha Ivanov

Water should not come with a body count.

Gary Peterson has survived murderous rooms, fake rescue doors, and a dungeon system that treats human suffering like a maintenance shortcut. Now Root Fault 3 has opened beneath Node 6-D, where the water lines are reversing, breath is being stolen from the drowned, and every clean solution has teeth.

Gary cannot go in.

The black key wants him to. The system wants him to. Every heroic instinct in his battered old bones wants him to. But this time, becoming the answer might be the trap.

So Node 6-D must fix itself.

Veyra, Ora, Kett, and a crew of exhausted survivors face flooded pumps, hidden collars, dirty lifts, drowned support layers, and an ancient thirst that thinks need is permission. The water can be made to flow again - but only if nobody pays for it with breath, pressure, skin, or silence.

Gritty, darkly funny, and packed with brutal dungeon-system horror, Book 4 of The RPG Citadel Protocol digs deeper into the Citadel's ugliest truth:

Survival is not enough if someone hidden is paying the bill.

Grab Book 4 now and return to the dungeon where the water is dirty, the fixes are uglier, and maintenance is still very, very overdue.

• Format: Paperback
• Language: English
• ISBN: B0H5VSD7H3
• ISBN13: 9798182014144
• Release Date: June 2026
• Publisher: Independently Published
• Length: 682 Pages
• Weight: 1.78 lbs.
• Dimensions: 1.7" x 6.0" x 9.0"