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The Old Kingdom DLC Brings New Strategic Depth to Cataclismo’s Fortress Defense

Cataclismo The Old Kingdom DLC fortress defense gameplay screenshot

The Old Kingdom DLC Brings New Strategic Depth to Cataclismo’s Fortress Defense

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Digital Sun and publisher Hooded Horse have launched The Old Kingdom, the first major expansion for Cataclismo, and it fundamentally reshapes the way players approach the game’s fortress-building survival formula. The DLC, which arrived on Steam on August 20, pushes players far beyond the familiar territory of the Last City’s surrounding biomes and into a vast, corrupted continent that demands both military cunning and economic planning.

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Where the base game focuses on defending a single citadel against waves of Horrors, The Old Kingdom introduces a strategic campaign mode where you must conquer and hold multiple fortified positions across a large map. Each citadel functions as its own resource hub, and connecting them through supply lines becomes essential as you expand your territory. The mode layers turn-based strategy on top of Cataclismo’s real-time siege defense, giving the expansion a distinctly different feel from the core experience.

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The expansion also brings new enemy types, additional building options, and fresh threats that escalate as you push deeper into the corrupted lands. Managing supply chains between your outposts adds a logistics challenge that the base game only hinted at, and the new strategic layer gives every fortress you build a purpose beyond simply surviving the next night.

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For Steam players who have been building elaborate brick-by-brick fortifications since the game left Early Access earlier this year, The Old Kingdom offers a reason to return. The expansion is priced at $8.99 USD (currently 10% off at launch) and requires the base game. If you have been waiting for more strategic meat to go with Cataclismo’s inventive building system, this is the update that delivers it.

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Cataclismo: The Old Kingdom on Steam

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Cataclismo on Steam

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Jordan Hayes covers PC gaming news, hardware, and the ever-changing Steam ecosystem for SteamGamer.net. He believes some of gaming’s biggest stories are hiding in patch notes, performance charts, and suspiciously quiet price changes. When he isn’t investigating what developers or GPU manufacturers are doing, he is probably starting another roguelike run he insists will be his last.

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