Post-apocalyptic world

Period: Before the collapse (late 3rd millennium)

Reaching the year 3000 didn't signify wisdom, but rather an insatiable acceleration. For centuries, humanity believed itself to be the absolute master of the planet. Technology advanced by leaps and bounds: underwater colonies, elevated cities, genetic engineering, and seemingly inexhaustible energy sources… but it all came at a hidden cost.

To sustain this pace, the Earth was exploited to its limits. The last primeval forests were felled, ancient aquifers dried up, deposits of rare minerals were depleted, and oceans and the atmosphere were polluted to irreversible levels. The climate became unstable: extreme hurricanes, decades-long droughts, and heat waves that rendered entire regions uninhabitable.

By the year 3120, clean water, fertile soil, and fuel were more valuable than gold. The great powers and corporations did not seek equitable solutions; they simply hoarded what little remained, generating escalating global tension. Progress had become a suicidal race, and nuclear war was not an accident: it was the logical consequence of a civilization that chose domination over survival.

Period: The Outbreak (around the year 3145)

The trigger was control of the continent's last large reserve of clean freshwater, but the real cause was the arrogance accumulated over millennia. When negotiations failed, the war machines were activated within hours. In less than a day, more than 18,000 nuclear warheads of varying ranges exploded over cities, industrial centers, military bases, and strategic areas.

It wasn't just physical destruction: it was the awakening of the worst in humanity. As systems collapsed, even before the first bomb fell, chaos already reigned in the streets: looting, murder, betrayal, and the abandonment of all moral compass. Millions died instantly from heat, pressure, or radiation; others suffered severe burns, permanent blindness, and poisoning that would cause a slow and painful death over days or weeks. Many wished they hadn't survived the first wave, knowing that what came next would be far worse.

Humanity demonstrated its most unpredictable nature: capable of creating wonders, but also of destroying everything built out of a simple instinct for power and selfish survival.

Period: 3145 – 3500

After the nuclear explosion, the world was plunged into a radioactive winter for almost eighty years. Sunlight barely managed to penetrate the thick curtain of ash and debris, and the average temperature plummeted by more than 12°C. Civilization completely collapsed: cities became tombs of steel and concrete, water turned to poison, and food became desperately scarce.

For two centuries, humanity lived in the shadow of its own mistakes. Radiation altered genomes, generated incurable diseases, and gave rise to deformed and hostile creatures. The societies that managed to survive were organized under brutal rules: power belonged to whoever controlled the water, the filters, and the least contaminated land. Betrayal, violence, and exploitation became commonplace; it seemed that nothing would ever be the same again, and that the planet itself was condemned to a slow death.

But what no one expected was that Earth had its own way of resisting. While humans clung to survival in miserable conditions, the biosphere began an accelerated and unknown process, as if the planet had activated an urgent regeneration mechanism. What science said would take millennia to recover began to happen in a matter of decades, paving the way for a radical change that no one foresaw.

Period: Around the year 3501

With only a few decades left until the year 3500, the change became evident. The Earth began a process of adaptation and regeneration at an impossible speed: what was estimated to take tens of thousands of years was completed in just two centuries.

The atmosphere was completely cleansed. Toxic particles were absorbed or transformed by new types of algae and plants that sprang up spontaneously. The sky regained its deep blue hue, covered with dense clouds laden with pure water; the air became fresh and free of impurities. Most astonishingly, the percentage of oxygen in the atmosphere increased dramatically, from the original 21% to over 32%, a level not seen on Earth since prehistoric times.

Nature reclaimed everything: the ruins of cities were covered by lush forests, giant vines, and resilient grasses that broke through concrete and steel. What early explorers called Hyper-Nature was born: an accelerated, aggressive, and dynamic ecosystem where species mutated and evolved in short generations to take advantage of the new conditions.

This change brought a new challenge: all living beings, including humans, had to adapt to an environment with more oxygen, greater humidity, and a much more active and competitive biosphere. Those who managed to survive now inhabit a renewed world, but one that is wild, unpredictable, and alien to what their civilization once was. The old calendar loses all meaning: we are now in the year 3501, and a new era begins, where the planet no longer waits to be dominated, but imposes its own rules.

Period: 3501 – 3520

With the arrival of Hyper-Nature and the drastic increase in oxygen, the ecosystem recovered conditions unseen on Earth for millions of years. What seemed impossible happened: species thought to be completely extinct reappeared, not through human intervention, but through an accelerated biological mechanism activated by the planet's own regeneration.

Remnants of seeds, spores, and genetic material that had lain dormant in the soil, ice, or even deep underground, awoke in the face of new levels of moisture, oxygen, and nutrients. Giant conifer forests, tree ferns, and plants with structures that hadn't grown for centuries appeared. But it wasn't just vegetation: animals thought lost forever also emerged, not identical to their ancestors, but adapted to survive in this new environment.

These beings found in the renewed world a space free from the old competition. However, their return was not a peaceful gift: they brought with them rhythms of life, reproductive cycles, and spatial needs that immediately clashed with what remained of human civilization. Earth wasn't returning its past, but repurposing it to build something new, and no one had the right to claim it.

Period: 3515 – 3550

Alongside the returning species, life forms emerged that had never existed before in the planet's history. The combination of residual radiation, accelerated genetic mutations, high oxygen levels, and competition for resources generated an unprecedented explosion of biodiversity.

These new species are the result of the merging of separate evolutionary lineages, extreme adaptations, and previously unsustainable characteristics. There are plants that grow several meters in weeks, that release chemical substances to defend themselves or attract prey; animals with amplified respiratory systems, larger size, greater physical resistance, or senses sharpened to the limit. Some are harmless and perform vital functions to balance the environment, but many others are aggressive, territorial, and very dangerous.

Ancient science has no names or classifications for them. Survivors know them only by their behavior: shadow predators, swarms of membranous wings, creatures that change color according to radiation or humidity. This new realm demonstrates that Hyper-Nature does not stop at restoring: it creates, transforms, and discards what does not fit, regardless of whether it is convenient for humanity.

Period: 3520 onwards

These are the animals that survived nuclear war, radioactive winter, and scarcity for two centuries. What once helped them survive—small bodies, slow metabolism, resistance to toxins—had to change radically in the face of Hyper-Nature and high oxygen levels.

General characteristics: They increased in size by up to 40% on average. Their respiratory system expanded to process more air without suffering from poisoning; their bones became lighter but stronger, and their skin or fur developed protective layers against irritating plants and intense sunlight. Many retain some residual tolerance to areas with low radiation.

Defense mechanisms: Some produce skin secretions that repel predators or neutralize toxins in the soil; others develop horns, claws, or longer, sharper teeth. Their sense of smell and hearing become acute enough to detect dangers from more than a kilometer away.

Advantages: They adapt better than any new species to sudden changes in the environment; they can move between green areas and areas with traces of pollution without serious problems.

Behavior: Most travel in herds or family groups. Living together provides security, facilitates foraging, and allows them to protect their young. Only larger, more solitary species prefer isolation.

Period: 3520 – Onwards

For the species that managed to survive nuclear war and the radioactive winter, the change was not a gift, but a test of survival. What for centuries had been an advantage—resistance to radiation, slow metabolism, the ability to live with little—now became an obstacle in the face of oxygen-rich air and an abundance of life.

The adaptation process was rapid and brutal. Many populations died from oxygen poisoning, metabolic imbalances, or an inability to compete with the new and returning species. Those that managed to survive underwent visible transformations: their bodies grew in size, they developed more efficient respiratory systems, stronger bones, and hides or coverings that protected them from both intense sunlight and more potent natural substances.

Even humans are part of this group. Those who failed to adapt suffered chronic headaches, lung damage, and neurological disorders, eventually dying. Those who did adapt gained greater physical endurance, enhanced recovery, and sharper senses, but they also acquired new limitations: they cannot return to areas with low oxygen levels without specialized equipment, and their metabolism now requires more food and water to sustain them. All, old and new, are subject to the same rule: evolve or disappear.

Period: 3505 – 3530

They are not exact copies of species that went extinct millions of years ago, but rather reactivated and modified versions, adapted to the new atmosphere. They awoke from seeds, spores, or dormant genetic material that remained inactive for centuries, awaiting suitable conditions.

General characteristics: They have impressive dimensions—some amphibians, reptiles, and arthropods reach sizes not seen since the Mesozoic era. Their metabolism is very efficient with abundant oxygen, giving them tremendous strength and endurance. Their growth cycles are faster, and they reproduce more frequently.

Defense mechanisms: They have rock-hard scales, reinforced shells, or thick layers of skin that resist bites and blows. Some can release irritating substances or change color to confuse their enemies. Their size alone is already a protective barrier.

Advantages: They dominate the space and resources in the areas where they settle; they have few natural predators thanks to their strength and size.

Behavior: Many organize themselves into hierarchical groups or large herds, especially herbivores, for protection from predators. Larger carnivores are usually solitary or only travel in pairs during the breeding season.

Period: 3515 – 3560

These are creatures that have never existed before in the history of the planet: the result of genetic fusion, accelerated mutation, and extreme evolutionary pressure. Hyper-Nature not only recovered the past but also invented new solutions to fill every gap in the ecosystem.

General characteristics: They combine traits from different species—for example, mammals with insect-like respiratory systems, or birds with membranes that allow them to glide for days. Their blood transports oxygen three times more efficiently than that of any other ancient animal, giving them almost constant energy. Many have sensory organs capable of detecting changes in humidity, radiation, or the chemicals in the air.

Defense mechanisms: These are very varied: some release anesthetic or poisonous gases; others can regenerate tissues and limbs in a few weeks; some camouflage themselves by imitating plants or rocks, or even emit sounds that disorient their enemies.

Advantages: They are the best adapted to the current environment; they withstand abrupt climate changes better and take advantage of resources that other species cannot use.

Behavior: It depends on their ecological niche. Herbivores and omnivores tend to form large herds to reduce risks. Medium-sized predators hunt in coordinated groups, while the largest and most dangerous are usually territorial and solitary, marking areas that no one else can occupy.

Period: 3550 onwards

Classified list of animals that survived the collapse or awoke from their dormant state, already adapted to the Hyper-Nature environment.

🟢 Zero Level – No risk

• Moss Rat (Rattus viridis)
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• A small rodent covered in a layer of moss-like tissue. It feeds on algae and plant debris. It flees at any sudden movement.
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• Advantage: It serves as an indicator of areas with clean air and water.
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• Behavior: In small colonies.
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• Blue-feathered Pigeon (Columba caerulea)
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• Medium-sized bird with greater lung capacity. It does not attack or approach settlements.
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• Behavior: In large flocks.

🟡 Zero Level – Low

• Thick-furred Fox (Vulpes robusta)
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• Larger than its ancestors, with fur resistant to irritants. It eats fruit, insects, and carrion. It only defends its burrow if cornered.
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• Behavior: Couples or small family groups.
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• Hardy Shell Turtle (Chelonia durissima)
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• Double-thick shell, very slow metabolism. It buries itself in the ground when threatened. It has no attack mechanisms.
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• Behavior: Solitary.

🟠 Low – Medium Level

• Broad-tailed wolf (Canis amplicauda)
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• Larger and stronger than the ancient wolf, with senses three times sharper. It avoids humans unless there is an extreme shortage of food.
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• Advantage: Resists areas with mild residual radiation.
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• Behavior: Herds of 6 to 12 individuals.
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• Branched Antlered Deer (Cervus ramifer)
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• Up to 2 meters tall, antlers with multiple points. Males are aggressive only during the rutting season; outside of this they flee.
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• Behavior: Herds of up to 20 individuals.

🔴 Intermediate – Advanced Level

• Stone-scaled Crocodile (Crocodylus lithos)
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• Resurrected and modified; it reaches 7 meters in length. Its skin resists cuts and blows. It attacks from the water anything that approaches the shore.
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• Advantage: It can remain submerged for more than an hour.
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• Behavior: Solitary or in pairs in hunting areas.
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• Strong-legged Ostrich (Struthio validus)
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• Resurgent, it measures up to 3 meters. Its legs can break bones with a single blow. It aggressively defends its territory and young.
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• Behavior: Groups of 3 to 5 specimens.

Period: 3550 onwards

Creatures that never existed in ancient history, the product of accelerated mutation and genetic fusion. Their behavior is less predictable, and their danger is considerably increased.

🟠 Intermediate Level

• Algae Lizard (Phyto lacerta)
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• Its body is covered in symbiotic algae, providing perfect camouflage. It measures up to 1.2 meters. It only bites if stepped on or trapped; its saliva causes mild but not fatal irritation.
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• Advantage: Goes days without drinking water.
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• Behavior: Solitary.

🔴 High Level

• Shadow Dog (Canis tenebris)
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• Slender body, dark fur, and light-reflecting eyes. Hunts in coordinated teams, surrounding its prey before attacking. Its bite can infect wounds with resistant bacteria.
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• Advantage: See and smell in total darkness.
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• Behavior: Herds of 4 to 8 individuals.
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• Giant Hornet with Strong Venom (Vespa toxica)
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• Up to 8 centimeters in length. Its stinger releases a substance that causes intense pain and fever. A few stings can be fatal to a human.
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• Behavior: Swarms of up to 500 individuals.

⚠️ High Level – Dangerous

• Sharp-scaled Snake (Dracolepis acutus)
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• It measures up to 9 meters. Its scales are as sharp as knives and come off on contact. Its venom paralyzes muscles in a matter of minutes. It only attacks if someone enters its territory.
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• Advantage: It crawls silently through trees and on the ground.
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• Behavior: Solitary and very territorial.
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• Glass-fanged wolf (Canis gladius)
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• Evolved and improved version, the size of a small horse. Long, strong tusks, immense strength. Fearless of fire or loud noises.
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• Behavior: Packs of up to 15 individuals; organized with a strict hierarchy.

☠️ Dangerous Level

• Tree-top predator (Arboris ferox)
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• A new creature, a mix of feline and bird adapted to tall forests. Up to 4 meters long, with retractable claws and a jaw capable of breaking light armor. It attacks from above without warning.
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• Advantage: It camouflages itself among the leaves and moves between branches with extreme agility.
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• Behavior: Solitary; only comes together during mating season.
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• Earthworm and Root Worm (Terra vermis)
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• Cylindrical body up to 12 meters long. It moves underground and creates tunnels that can collapse structures. It releases a gas that stuns its prey. It has no natural predators.
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• Behavior: Solitary; occupies large areas and does not allow competition.

Period: 3550 onwards

For survivors and explorers, it's crucial to distinguish each creature type and understand how they move. This card summarizes their patterns to help you avoid fatal mistakes.

• Transformed: Medium risk. They are predictable and follow known instincts. In a pack they can become aggressive if they feel threatened or if they are protecting their territory; if they are alone, they prefer to flee rather than attack.

• Resurgents: High risk. Their size and strength make them dangerous. When in groups, they will attack without hesitation if anyone gets too close. Solitary specimens are more fearsome, as they lack support and defend their territory with extreme violence.

• New species: Variable risk, but generally very high. Their behavior is unpredictable; they don't follow old patterns. Many hunt in organized groups with complex strategies, while the largest act as apex predators without rivals. Their defenses are often unknown until experienced firsthand.

General rule: In this world, seeing a lone animal doesn't mean you're safe; it's usually a sign that the rest of the pack is hidden, or that it's a dominant individual. Nature is no longer the same as the one humanity destroyed: now it's stronger, faster, and much harder to control.

Period: 3550 onwards

Built to withstand nuclear attacks, these facilities are the most robust structures still standing. They were designed to operate autonomously for centuries, and many remain partially active.

Features: Reinforced concrete walls and special metal alloys, armored doors, ventilation and filtration systems that are still operational in some cases. They are mainly found in slow-deposition areas or underground.

Technology that can be found:

• Autonomous energy systems: small reactors or long-life batteries that continue to store charge.
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• Protective equipment: sealed suits, filter masks, night visors and radiation meters.
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• Defensive structures: construction plans, reinforcement panels, containment nets and high-security locks.

Useful resources:

• For weapons: High-strength steel, light but hard alloys, precision springs, seamless steel tubes, stabilized gunpowder, and ammunition capsules in good condition.
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• For bases: Prefabricated blocks, armor plates, locking systems, resistant pipes and emergency generators.

Dangers: Most have active automated security systems: motion sensors, cameras, traps, and defensive turrets. In addition, the passage of time has left structural gaps and areas with accumulations of gases or localized radiation.

Period: 3550 onwards

The world today is divided into zones defined by their level of recovery, danger, and what they can offer. There are no official borders, but survivors recognize these territories by their characteristics and risks.

• 🌿 High Recovery Zones: Lush forests, fertile valleys, and clear rivers. Here, Hyper-Nature has progressed most rapidly; giant vegetation and new or resurgent species abound. The air is the richest in oxygen, but it is also where wildlife is most active and competitive.
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• ☁️ Transition Zones: Ancient plains and medium-sized cities partially covered by vegetation. Residual radiation is low, there are accessible ruins and varied resources. It is the most traveled zone, but also where the paths of factions and creatures intersect.
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• ☢️ Slow-Decay Zones: Areas where atmospheric cleansing was incomplete. They still have low levels of radiation and acidic soils. Vegetation is sparse and resistant; only species adapted to toxins survive. This is where the best-preserved structures are found.
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• 🏗️ Industrial Remains Zones: Former complexes, factories, and storage centers. Although in ruins, they hold metal parts, pipes, cables, and materials that are no longer manufactured. Access is difficult, and they are often occupied by territorial creatures.

Every region holds something valuable, but nothing is obtained without paying a price.

Period: 3550 onwards

Hidden underground, in mountains, or within industrial complexes, these facilities operated in the years leading up to the war. Their aim was to push beyond known limits, and when everything collapsed, they were sealed off with their work unfinished.

Advanced technology:

• Genetic analysis equipment, water and air filtration stations with a capacity far superior to the current ones.
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• Environmental regulation systems that keep the interior stable, even when the exterior changes.
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• Synthetic materials resistant to wear, corrosion and radiation; lighter and stronger than any common metal.

Experiment logs:

• Biological: Attempts to create toxin-resistant crops, improve human resistance to radiation, and accelerate plant growth cycles. Many of these processes, released into the environment after damage to the facilities, accelerated nature's adaptation.
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• Chemicals: Compounds used to purify water, preserve food, or neutralize contaminants. Some are useful; others are highly toxic if misused.
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• Technological: Prototypes of power tools, low-energy lighting systems and long-range communication devices, although they are often damaged or missing key parts.

Dangers: Sometimes the experiments were not destroyed: there are active samples, accelerated strains of bacteria, or even creatures that were trapped and have survived by feeding on whatever they found.

Period: 3550 onwards

With the right resources, it's possible to create tools, weapons, and shelters that increase the chances of survival. This is the information that has been preserved and tested.

⚔️ Bladed Weapons:

• Short Sword / Axe: Made with military-grade steel for a long-lasting edge. It is heat-controlled and tempered to prevent bending. Balanced weight for easy handling.
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• Reinforced Spear: Carbide or steel tip, treated wood handle or metal tube. Greater reach and more protection against predators.
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• Multipurpose Knife: Thin but sturdy blade, suitable for cutting, skinning or self-defense.

🔫 Firearms (repair or simple manufacture):

Only simple models can be manufactured or old weapons repaired. Seamless steel tubing, a firing chamber, a firing mechanism, and stabilized gunpowder are required. They are powerful, but ammunition is very difficult to obtain or manufacture safely. Their use attracts attention due to the noise, which is a risk in wilderness areas.

🏠 Foundation Construction:

• Walls: Combine composite panels with metal beams and sealants. This creates a solid, waterproof structure with protection against low radiation.
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• Access: Reinforced doors with steel frames and mechanical locks. More than one entrance and exit is recommended for security.
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• Internal Systems: Using filters found in laboratories or bases, water and air purification systems can be installed. Recovered generators provide limited light and power.

All of this requires knowledge, patience, and great care. Poor manufacturing can fail at the most critical moment, or even cause fatal accidents.

Period: 3550 onwards

In ruins, bases, and laboratories, resources can be found that allow for the creation of equipment far more durable than that made with common materials. The most useful ones are listed here:

🔩 Weapon materials:

• Military Grade Steel: Harder and more flexible than regular steel. It holds its edge for a long time and won't break under strong impacts. Ideal for swords, axes, spear points, or firearm barrels.
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• Light Alloy: Weighs half as much as steel but has almost the same strength. Suitable for handles, guards, locking mechanisms, or moving parts.
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• Tungsten and Carbide: Very hard and heat resistant. Used to reinforce points, edges or hammers.
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• Stabilizing Compounds: Found in laboratories; they are used to mix gunpowder or create fuels that do not degrade over time.

🏗️ Materials for building bases:

• Composite Panels: Sheets of concrete, fiber, and metal that resist shocks and impacts and filter some radiation. They are used for walls and roofs.
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• Polymeric Sealants: Synthetic masses that harden upon contact with air, waterproofing and sealing cracks.
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• Cables and Conduits: Made of coated copper or special alloys, they allow the transport of energy or water without losing efficiency.
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• Reinforced Beams: They support much more weight and tension than old wooden or iron beams.

⚠️ Note: These materials are scarce. They are not found in just any ruin; they are usually stored in locked warehouses or in high-risk areas.