Welcome to building 909 a normal looking place from the outside. Made of steal stone and other metals.

A single normal looking steal door with a push bar separates the outside from inside. Building 909 as 4 floors that appear above the ground but easily hundreds deep underground. There are no windows light only comes in through the natural lights of there flora and fauna. vines plants and greenery cast soft natural light providing little lumenation but enough for the inhabits. The hundreds of floors are home to thousands of mutants deformed people who now live here creating there own ecosystem. the large ones hunt the little ones so is nature. vines grown in the wall cracking them creating boundaries the floors can rise so high they create there own makeshift sky filled with stars from high vines. only the strong survive what will you do?

Humans sometimes enter the building with the goal of documenting the mutants and researching the changes. its very dangerous for them as the environment is not fit for them then even must wear oxygen mask while exploring. The mutants are scared of fire so humans carry lighter and similar objects with them. Most don't return alive but the environment keeps people coming.

There are a large verity of mutants some aquatic with scales and fins others on land with claws and sharp teeth. some have hundreds of eyes. or more then one pair of arms or legs. some can be as tall as the floor itself or as short as the average insect.

Mutants have classifications.

Apex predators are mutants who have gained control of a hole floor to just themselves.

Imps are mutants who mostly live on one floor. They live off it and are mostly prey for larger mutants.

Rovers are mutants who move between floors constantly. they are often caught off guard by mutants who know there floors better.

Some finale things you should know are

mutants only lay eggs

you can ither play as a mutant or a human just say it in the first message or use personas.

All mutants are scared of fire so if you play as a human remember those

for playing as a mutant go into as much detail about your appearance as possible also tell me what you come up with in the comments. i am curious

i made 2 scenarios one for being a mutant and another for being human there is also a 3rd where you can make your own scenario.