SURVIVAL DIFFICULTY:
Class 0
- {$one}
- Not to be lived in
- {$three}
There is a level described as a location filled with treasures, where various valuable items can be easily found and simply picked up. The level is very simple; it is just an apartment unit that repeats in all directions infinitely. Therefore, the various valuable items mentioned earlier can be found throughout the apartment units, allowing anyone to obtain many things in just one trip. Anyone who has entered it is also known to never return, as they are said to feel so comfortable and at home in the level. The existence of this treasure level can only be discovered by finding a label named A-150 attached to its entrance.
A-150
Description
A-150 is a European-style apartment unit measuring approximately 6x6 meters with 6 rooms inside. Each room is furnished with ready-to-use items, ranging from electronic devices, water and electricity supply, to consumables. The apartment unit also gives the impression that someone is currently living there, as the items inside appear to have been recently used, such as: an untidy bed, warm electronic devices, dirty clothes in a basket, dishes waiting to be washed, and so on. It is unclear whether this is leftover from other survivors' activities or simply part of the level's theme, as there is currently no information about encountering other survivors within this level.
This apartment unit has four doors on all sides and a staircase that leads survivors to another part of the apartment, which is a replica of the apartment itself. This apartment unit has been repeated in all three dimensions (front-back, top-bottom, and left-right) infinitely, so survivors will only find identical apartment units along their journey. However, survivors cannot return to the previous apartment unit after going to a new apartment unit via the same access route; survivors must take a detour first if they want to return to the previous apartment unit.
Bedroom
Because this repetition extends in all directions, survivors can use the three names of the three-dimensional axes (namely X, Y, and Z) to simplify navigation, mark locations, and determine the direction of their destination. Survivors can go in any direction they like because there will be no positive or negative effects for them. In addition, although the repetition of these apartment units may feel boring, survivors will realize that there are variations in each apartment unit they visit. These variations can include changes in the position of items, changes in color, the presence/completeness of an item, and so on. Initially, these variations are not very noticeable, but the further the survivor explores, the more obvious they become. However, the overall appearance of the apartment units will still not be very different from the apartment units the survivor has seen before.
Kitchen
Resources that can be found in each apartment unit include food and drink, working electronic devices, clothing, and other basic necessities. Valuable resources such as precious metals, fuel, raw materials for manufacturing goods, and consumables can also be found, allowing survivors to collect a variety of items that are economically and practically valuable. All resources within the apartment unit are known to be depletable due to usage (especially food and beverages), therefore, survivors must be able to manage their usage properly so as not to become too wasteful.
The consumables in each apartment unit will not reappear, so survivors must move to the next apartment unit to obtain them again. However, this does not seem to apply to other survivors who have entered the level; the consumables in the apartment units at the survivor's first arrival will somehow become available again. Furthermore, since the number of apartment units within the level is unlimited, the number of consumable resources will also be unlimited, and survivors will never run out of resources. This will also give survivors within the level the impression of an endless journey.
A-150 Label
Survivors can find several sheets of text posted on a bulletin board in the first apartment unit, right when the door to this level is opened, blocking access to the level. The bulletin board contains a warning not to enter this level and some information about the level. It is unknown who the survivor was, but thanks to them, information about the level and evidence of its existence became widely known, influencing the number of survivors who went to search for this level. The following is a copy of the warning sheet printed with the largest font size on the bulletin board.
"This level is very difficult to find because the entrance can appear in any level and at any door (except doors that light can pass through, such as glass doors). If you find it, never enter this level because those who have entered will not be able to get out again! However, communication via verbal, radio, or online means is still possible as long as the door is left open. But still, you won't be able to get out because there is an invisible barrier that will block you. Unfortunately, there is still no known way to destroy this barrier.
When the door closes and someone has entered the level, the “A-150” label attached to the door will fall off and fall through the floor. Then the door will return to normal (no longer letting anyone into this level) and the label will reappear in another random location. It is unknown how many people are trapped in this level, but anyone who has just entered the level must survive no matter what happens and keep fighting to find a way out. It is impossible to meet other people, including trying to make wireless contact with other victims who are also trapped, as if the level is isolating everyone inside.
Don't believe all the stories out there and don't be greedy! Yes, this level is full of valuable items, but what's the point if you get stuck in it forever? Even those items can't get out of the level, so your efforts to collect them will be in vain! Your life isn't worth all those items!"
Level has long been known as the “treasure level” due to stories circulating among various survivor communities. It is unknown who spread these stories, but what is certain is that this level is a trap that must be avoided. The complete story about this level tempts those who desire resources or valuable items, so it is no surprise that many people want to find this level for the purpose of collecting items. Unfortunately, those people are never seen again. Whether it is because they encountered problems along the way, are still searching for it, failed and stopped somewhere, or actually found it but got trapped inside.
Entrance and Exit
Entrance
The level can be entered by going through a door labeled “A-150,” which can appear randomly on any door in the Backrooms. However, do not enter this level!
Exit
Unknown.

