Cataclismo

Cataclismo on PC is a single-player real-time strategy game that combines fortress construction, resource management, exploration, and tower-defense combat. The current storefront name remains Cataclismo, with no verified rebrand or replacement edition. Developed by Digital Sun and published by Hooded Horse, it asks you to build humanity's defenses piece by piece, then survive the nightly assault of the Horrors.

Build by day, defend by night

The central loop alternates between preparation and crisis. During the day, you expand settlements, gather materials, recruit troops, explore nearby areas, and improve your defensive layout. When night arrives, the Horrors attack in force, turning every weak wall, exposed route, and poorly protected structure into a potential breach.

Cataclismo uses an isometric, bird's-eye strategy perspective suited to managing both the wider settlement and individual defensive positions. It is not a conventional city builder where buildings are placed as finished blocks. The defining system is brick-by-brick construction, allowing you to assemble walls, towers, platforms, stairs, and firing positions around the shape of the terrain.

Defensive planning is closely tied to combat. Chokepoints, height advantages, wall access, and protected routes can determine whether a small force holds or the entire citadel collapses. Players who enjoy survival city building with a stronger emphasis on repeated defensive pressure may also appreciate procedural settlement strategy like Against the Storm, although Cataclismo is much more focused on fortifications and direct siege control.

Construction is part of the combat system

The modular building system is more than a visual tool. Structures have load-bearing requirements and structural integrity, so unsupported sections can collapse and kill friendly or hostile units. This creates a tactical relationship between architecture and battlefield control: a tower can provide a valuable firing position, while an unstable extension can become a liability when the enemy reaches its base.

Material choice also matters. Wood construction helps you expand quickly, while stone structures provide more durable defenses once the economy can support them. Rooftops and elevated platforms can extend the usable space of a fortress, but the best layout depends on resource access, enemy approach routes, and the positions from which your troops can attack safely.

Your army includes specialized units such as bowmen, cannoneers, hunters, ballista crews, and other unlockable defenders. Their value depends on placement rather than simple numerical strength. Archers benefit from clear sightlines and elevation, artillery answers heavier threats, and traps can turn narrow approaches into controlled kill zones.

Campaign structure and game modes

The narrative campaign is divided into several mission types instead of repeating one settlement formula. City-building missions combine settlement growth, prosperity, resource management, and multiple nights of defense. Expedition missions restrict your available units and construction pieces while emphasizing exploration and objectives. Tower-defense missions provide limited forces and materials, asking you to stop the Horrors before they destroy a stronghold or optional objective.

Progression unlocks additional units, buildings, and construction pieces as the campaign advances. The Citadel improvement line increases your military capacity, while the Book of Insight supports the broader progression structure. This makes the campaign a gradual tutorial for the game's systems without reducing every mission to the same economic opening.

Outside the story, Skirmish provides handcrafted scenarios, while Survival generates increasingly dangerous waves and lets you customize map-generation options. Sandbox mode removes the normal resource and maintenance pressure, giving you free access to buildings, units, and Horrors for experimentation. The game also includes a level editor and Steam Workshop support for sharing maps and blueprints.

Biomes, terrain, and tactical pressure

Terrain is not decorative. The available environments include Highlands, Wetlands, and Depths, each changing how you read the battlefield. Wetlands introduce rain that can affect attacks unless units are sheltered, while the Depths sharply reduce sight range and make scouting and defensive positioning more demanding.

The day-night cycle gives each map a clear rhythm, but the most important decisions often happen before combat begins. You need to connect resource deposits to storage, protect recruitment and housing infrastructure, preserve routes for troop movement, and leave enough space for the fortress to grow. A wall that looks secure from one angle may create poor firing coverage or trap defenders when the next wave arrives.

Content model and current PC edition

Cataclismo is a premium single-player game rather than a free-to-play strategy title. The base purchase includes the narrative campaign, Skirmish, Survival, Sandbox, the construction system, map editor, and community-sharing features. The storefront also lists The Old Kingdom as a separate expansion, adding a strategic mode based on conquering and defending multiple citadels while managing supply lines, economy, and military reinforcement across a wider campaign map.

A separate Supporter Pack is also listed for the game. It is optional and does not define the core gameplay loop. Players comparing siege-focused PC strategy games can also look at horde-defense RTS design in Age of Darkness: Final Stand, but Cataclismo stands apart through its physically structured fortress building and emphasis on custom defensive architecture.

Who Cataclismo suits

Cataclismo is a strong fit for players who enjoy single-player RTS campaigns, defensive base design, tactical unit placement, and systems that reward rebuilding a layout after failure. It particularly suits players who want their walls, towers, and firing platforms to be part of the strategy rather than background decoration.

It is less suitable if you want conventional competitive multiplayer, relaxed city-building without attacks, or a purely economic management game. The current PC offering is centered on solo play, and the game's tension comes from managing hostile waves, limited resources, and structural vulnerabilities rather than competing against human opponents.

For another fortress-centered survival strategy comparison, large-scale medieval horde defense like Diplomacy is Not an Option shares the pressure of expanding an economy while preparing for overwhelming attacks, although its construction and combat systems are substantially different.

PC features, storefronts, and localization

Cataclismo is available for Windows PC through Steam and GOG. The Steam edition includes Steam Workshop, Steam Cloud, achievements, trading cards, and Family Sharing. GOG lists the game as DRM-free, with an offline installer that does not require GOG Galaxy to launch the game.

The game supports English full audio and a broad subtitle and interface selection including French, German, Spanish, Italian, Portuguese-Brazil, Polish, Russian, Japanese, Korean, Chinese, Ukrainian, Czech, Hungarian, and Turkish. It is designed primarily around mouse-and-keyboard strategy controls; no official full controller-support feature is listed on the main Steam product page.

Cataclismo FAQ

Is Cataclismo a city builder or a tower-defense game?

It combines both, but its defining identity is a fortress-building RTS. Settlement growth and resource management support the defensive battle, while the brick-based construction system lets you design the walls, towers, platforms, and routes used during each siege.

Does Cataclismo have multiplayer or co-op?

The official PC storefront features identify Cataclismo as a single-player game. Its Workshop, blueprint sharing, and level-editor features provide community content, but they do not replace conventional online co-op or competitive multiplayer.

What modes are included in the base game?

The base game includes a narrative campaign, Skirmish, Survival, and Sandbox. Survival uses progressively harder waves and configurable map generation, while Sandbox removes resource and maintenance pressure for unrestricted construction experiments.

Does Cataclismo support custom maps?

Yes. The game includes a level editor for creating and sharing skirmish maps, along with Steam Workshop support for community maps and defensive blueprints.

What is The Old Kingdom?

The Old Kingdom is a separate expansion built around a strategic multi-citadel mode. You conquer and defend several strongholds, develop the wider economy, move supplies between locations, and reinforce defenses as the threat escalates.

Is Cataclismo available DRM-free on PC?

The GOG edition is listed as DRM-free and supports offline installation without requiring GOG Galaxy. The Steam edition uses the normal Steam storefront and platform features.