Classic gamebook adventure Castle of Lost Souls arrives as a fully integrated questline in Golnir, adding new locations, choices, and dangers to the open-world RPG
Prime Games has announced a new DLC for its narrative-driven open-world RPG Fabled Lands, bringing the cult gamebook adventure The Castle of Lost Souls into the digital adaptation as a full Fabled Lands Quest expansion.
The announcement confirms that players will soon be able to tackle a dedicated questline inspired by Dave Morris and Yve Newnham’s Golden Dragon gamebook inside the existing sandbox of Harkuna.
Fabled Lands itself adapts the original open-world gamebook series into a systemic RPG where players travel freely between regions, manage their own ship, wealth, codewords, and blessings, and piece together stories across a non-linear map.
Released on Steam in 2022, the game has steadily expanded with DLC such as Lords of the Rising Sun and The Serpent King’s Domain, each adding new territories, quests, and mechanics while keeping the same free-roaming structure.
Castle of Lost Souls follows that same model: framed as a Quest integrated into the main campaign, designed to be discovered and tackled by existing characters mid-journey.
Castle of Lost Souls focuses on new content in Golnir, one of the series’ most grounded and folkloric regions. The DLC introduces fresh locations there, including the town of Lynton, and builds a full quest arc around the Castle and its sinister legacy.
Players can expect a structured, multi-stage investigation that threads through the countryside, drawing them toward the fortress and its demonic power. Long-time gamebook readers will recognize the premise: the arch-fiend Slank, dangerous bargains, and a journey that sits somewhere between rural horror tale and heroic contract work.
The digital version is built to sit naturally alongside existing Fabled Lands content, so the Castle becomes another dangerous destination on the map.
Adapted by writer Paul Gresty, who previously worked on The Serpent King’s Domain, this new DLC will feature a dense network of choices, failures, side paths, and conditional outcomes tuned for the game’s mechanics: codewords that remember past decisions, items and blessings that unlock alternatives, and consequences that can follow the player beyond the dungeon.
For Fabled Lands players used to wandering into trouble at their own pace, this Quest structure offers a sharper narrative spine while still respecting the open-world format.
Encounters in and around Golnir tie into existing character builds and resource management, giving more reasons to revisit the region with veteran adventurers and more early-to-mid game hooks for new runs.
The new areas and events promise additional routes to wealth, rare items, and danger, but within the same logic: tough checks, meaningful risks, and rewards that feel earned rather than dumped on the player.
For fans of the original gamebooks, this DLC also closes a loop that has been teased on the Fabled Lands blog for years, where Castle of Lost Souls as a Quest was discussed as a natural fit for Golnir and the PC adaptation.
Castle of Lost Souls has no release date for now, but we will learn more and share details soon. Below is some information on the base game.
Details about the base game
The original Fabled Lands gamebooks, written by Dave Morris and Jamie Thomson, and beloved by many, have been transformed into an epic, digital adventure of interactive fiction with a massive game world. Be anyone you want: explorer, merchant, priest, scholar, thief, wizard, or soldier of fortune. Buy ships, goods, and townhouses, join a temple, risk desperate adventures in the wilderness, or embroil yourself in court intrigues and the sudden violence of city backstreets. Undertake missions that will earn you allies and enemies, or remain a free agent and choose your own objectives. With hundreds of quests and locations to explore, the choices are all yours.
EXPLORE THE FABLED LANDS
- Open World
Revolution rages in a war-torn kingdom. You can join forces with the king to restore his throne – or look for profit in the pay of the dictator. Use fighting skills or sorcery, bribery or skulduggery to survive the assassins in city backstreets. Descend to the sewers of Yellowport to defeat the vile rat-king. Retrieve the golden net of the gods from the Repulsive Ones deep beneath the sea – and use the rewards of your victories to travel beyond the boundaries of the known in the world of Harkuna. Your journeys will bring you foes and friends, danger and triumph, fortune and fame – and more adventures than you thought.- Loot and Riches
Amass wealth, honours and power that will take you on voyages to uncharted regions. You can sail the high seas to distant ports. Plunder ancient treasures and do battle with the legions of darkness in the hall of the death-god. Penetrate the labyrinth of lies and sinister secrets of the scheming merchants of Golnir.CHOOSE YOUR PATH
- An old-school RPG
A solitaire role playing game in a pick your own adventure style like no other. Explore a giant open-ended world, where you can truly travel, investigate, and meddle with things, when and as you see fit to do so.- Create YOUR Character
Write your own story! You can be a warrior, using weapons and combat skills to strike down all opponents; a mystical mage, skilled in sorcery; a clever rogue, acquiring wealth by theft and trickery; a daring wayfarer, probing and charting the forgotten reaches of the wilderness; a priest, fighting dark monsters with the holy fires of faith; or a troubadour, charming all you meet on your many fabulous exploits.- Tactical Combat
Hideous dangers await travellers in this savage land. Brigands, trolls, golems, flying heads, assassins, vampires, kelpies, demons, abominable cults, the undead, and many more – all of them will vanquish the unsuspecting adventurer.SURVIVE AGAINST ALL ODDS
- Permadeath
Would you like to raise the stakes? Experience Ironman mode, where every decision is irreversible and your character dies once and for all.- Temples
Choose a deity and obtain its blessing. But remember: once an initiate, if you are to renounce a god or a goddess there is a price. Do you want to reconsider?- Ships
Buy your own ship: upgrade it and recruit a crew – their abilities might prove the difference when surviving a storm or vicious buccaneers. Fill your ship with valuable cargo and find where to sell it for profit.
