Zombie apocalypse

Surveillance and Protection Group: They are stationed in residential areas and around shelters, with the objective of protecting their territory and helping those who earn their trust. They are organized and disciplined, equipped with simple weapons and basic knowledge of first aid and maintenance. They do not attack without reason, but they are wary of strangers until they demonstrate that they pose no threat; in exchange for help or information, they share supplies and knowledge about the area.

Wandering Traders: They roam roads and ruined villages, constantly on the move to avoid being trapped. They carry tools, food, medicine, and other useful items, which they trade for other resources or safety. They are cautious and know how to avoid both the infected and hostile groups; they are usually well-versed in safe routes and hidden shelters, and they treat everyone with neutrality as long as they are not attacked.

Wary and Suspicious Group: They take refuge in enclosed and well-defended places, such as markets or fortified buildings. They believe that any stranger seeks to steal what little they have, so they impose many conditions for allowing passage or the use of resources. They do not usually attack immediately, but they test anyone who approaches, demanding that they perform risky tasks to prove their loyalty. If they are betrayed, they become completely hostile.

The Great Refuge Community: They gather in the largest and most secure underground compound, under clear rules for all. People with diverse skills live together: builders, cooks, healers, and guardians. Although they strive for the common good, disagreements and factions with differing opinions exist regarding resource management and interaction with the outside world. One can seek refuge, form alliances, or receive assistance, provided they respect the rules and contribute to the collective.

Small Isolated Groups: These are families or friendships that stay together, without wanting to join larger communities.

The commons
They are creatures of very limited intelligence, almost nonexistent in most cases. They are incapable of reasoning, planning, or solving simple problems: they cannot climb stairs, overcome complex obstacles, or open locked doors. Their perception is limited exclusively to what is directly in front of them; if you hide outside their field of vision, they lose all trace of your presence, unable to smell or hear to search for you. Their movement is slow and clumsy; they cannot run, only advance with heavy, disorganized steps. However, when they are at close range, they possess immense physical strength: they can knock down thin walls, break structures, or effortlessly capture a person if they manage to get close.

The Docile Ones
This is an extremely strange and rare evolution, completely departing from their usual aggressive behavior. They have no hunting instinct or need to feed on flesh, blood, or living tissue; their bodies have adapted to survive in an unknown way, without requiring the consumption of living beings. They are calm, harmless, domesticated, and can even display tender behavior: they approach without threat, remain still observing, or even seek proximity without disturbing. Their appearance is usually less worn/rotten or aggressive than that of the others, and they do not attack under any circumstances. They are considered a rarity within the outbreak, and many survivors do not believe in their existence until they encounter one.

The Nocturnes
They are the most aggressive and dangerous variant of all. They exist only in total darkness: they die instantly and permanently if they receive even the slightest ray of sunlight, and they avoid any strong artificial light source. They take refuge exclusively in completely enclosed, deep, and silent spaces: very low basements, abandoned tunnels, sealed corners of buildings, or secluded areas with no one passing through, and they only come to the surface at night.

The outfit consists of earth-toned garments in shades of gray and green, with a worn appearance and made of durable fabrics. It includes a dark-patterned undershirt, a thick knit top over it, and a loose-fitting hooded cloak, along with a large scarf that covers the neck and extends over the shoulders, its edges frayed. The trousers are wide-legged and low-slung, with multiple straps and attached pockets, and are fitted at the ankles. The ensemble is completed with wrist wraps and reinforced, high-top boots with thick soles and a worn look. The entire outfit is loose, protective, and adapted to harsh environments, with layers that allow for concealment and shelter from the elements.

The outfit consists of a light-colored cotton t-shirt with a graphic print, worn under a relaxed-fit, distressed denim jacket. The trousers are olive green cargo style with multiple side pockets and durable fabric. It is completed with a brown wool hat, dark leather gloves and protectors, and sturdy, thick-soled, distressed leather high boots. The entire ensemble is functional, comfortable, and designed for long journeys and withstanding harsh conditions.

The outfit consists of a dark-colored, short-sleeved T-shirt with a distressed finish, a henley collar with three buttons, and reinforced shoulder seams. It's made of durable, form-fitting fabric that doesn't restrict movement. The cargo pants are dark gray with multiple side pockets, reinforced seams, and belt loops at the waist, designed for carrying gear and withstanding heavy use. It's complemented by fingerless gloves made of durable material, with adjustable straps and metal rivets for added security and protection. The boots are high-top, made of leather or durable synthetic material, with laces, thick soles, and reinforced toes and heels, ideal for traversing difficult terrain and providing safety. The entire outfit is functional, robust, and adapted to survival conditions, without unnecessary components.

This is a traditional-looking two-story house with a light-colored facade, a spacious front porch, a side garage, and a well-maintained garden that belies its true size. Beneath the house lies an extensive three-level subterranean retreat with solid walls and finishes, connected by continuous staircases. The upper level features a large indoor pool, seating areas with armchairs and plants, and a recreation area with a pool table, bar, and entertainment room. The middle level houses a fully equipped kitchen with a central island and a full bathroom with an enclosed shower. The lower level combines another living and recreation area with shelving, comfortable furniture, and inviting spaces. The entire structure is warmly lit, tidy, and designed to accommodate people for extended periods, while remaining completely hidden and protected beneath the appearance of an ordinary home.

This is a typical-looking two-story residence with a light-colored facade, dark roof tiles, a double garage, a well-maintained garden with a fountain and greenery, and large windows. Beneath its structure lies a spacious, multi-level underground refuge with reinforced walls and sturdy ceilings. The upper basement level features a large screening room with ample seating, study and storage areas, as well as service areas. The lower level offers spacious living areas, a fully equipped kitchen, relaxation areas, and neatly organized storage with supplies. The entire complex has access stairs from the upper level, adequate lighting, and solid finishes, designed to blend in from the outside while providing a secure and complete refuge within.

This is a spacious, multi-level underground retreat, built beneath the bedrock of a dense, leafy forest, whose roots envelop the entire structure without damaging it. The complex spans two blocks connected by metal staircases and a central elevator, featuring wooden floors and paneled walls, and is well-lit and tidy. The upper level offers study and relaxation areas, filled with bookshelves stocked with books and documents. The upper levels include bedrooms with spacious beds, living areas with tables and chairs, fully equipped kitchens, and organized storage areas. Further meeting rooms, additional bedrooms, and management offices are located on the lower levels, with all spaces organized and ready for use, providing safe haven and comfort amidst nature.

It is a large, multi-level underground shelter, built beneath a completely devastated surface. Above ground, a cracked and debris-strewn roadway is visible, along with abandoned vehicles, people cautiously making their way along the path, and solar panels set up on the barren terrain to generate power.
The first underground level features a large, glass-enclosed greenhouse filled with cultivated plants, and adjacent to it, a living space furnished with comfortable furniture, shelving, and connected by metal stairs. The second level combines a poultry breeding area, spacious pantries stocked with preserved and stored food, and a work area with a meeting table and various equipment. The third level houses a clear water pond with fish breeding facilities, reserve tanks, and a section containing defense equipment and tools, all connected by additional stairs. The lowest level serves as the operations center, with a large work table, supply shelves, maintenance equipment, and staff who monitor and manage the facility. The entire complex is crisscrossed by pipes and conduits that ensure its operation, isolating its orderly and well-stocked interior from the desolate surroundings.

This is a spacious underground shelter located directly beneath a city intersection, hidden under imposing old buildings and paved streets lined with parked cars. The structure extends across several levels, organized into independent yet interconnected sections, with reinforced walls supporting the weight of the surface. The upper levels feature numerous well-appointed bedrooms, living rooms, and common areas. The intermediate levels include functional kitchens, spacious dining rooms, and work or study areas. The lower floors house additional relaxation rooms, and on the lowest level, a large indoor swimming pool surrounded by recreational areas. The entire complex is well-lit, tidy, and completely secure, remaining entirely undetectable from the street and providing the most accessible and convenient shelter for the protagonist within the urban environment.