Level Alpha-Omega

Level Alpha-Omega is a rumored sublevel of the mythical Hallowed Gate, possibly being its most significant aspect. With all the legends and lore surrounding it, it is considered to be one of the greatest mysteries of The Backrooms.
Description
Knowledge of Level Alpha-Omega initially became semi-public when the M.E.G unearthed ancient texts in Level 8 during an archaeological investigation. These texts spoke of an unknown, nameless location that could not be reached by normal means – being located outside of time and space – but held "the greatest treasure to ever exist". This discovery led to cross-referencing of other ancient texts, which were found to contain similar information. At this point in time, the existence of Level Alpha-Omega was not proven to be anything more than a mere myth, yet it captured the imaginations of those who learned about it. Suddenly, the legend was reborn in the modern day, with wanderers aspiring to reach this location just as their ancient predecessors had. With an expedition into the Hallowed Gate, Level Alpha-Omega's existence would become more likely. Although the M.E.G did not actually find the Throne Room within it, there were many indications to suggest that it was indeed present. When this information leaked out, a sweeping hysteria ensued amongst the wanderers of The Backrooms.
There are many theories regarding the nature of Level Alpha-Omega. Some believe it to be the true "final" level of The Backrooms. Meanwhile, those who deny this theory instead believe it to be a means of ending The Backrooms itself. Due to this, some call it the "Reset Room", or the "Save Room", as there is a theory that whoever enters and uses the room could wipe out the current version of the Backrooms, then either update or restore it. There is no certain, reliable description of Level Alpha-Omega, even in the ancient myths. The general consensus does however agree that the "Throne Room" is a sacred, forbidden chamber with regal architecture, almost divine, but not belonging to any mythology or culture that exists in The Frontrooms. At the center of the level is speculated to be a great throne, and supposedly a crown which is said to hold an immeasurable power. The "Crown of the Throne" is widely regarded as the ultimate form of power possible in The Backrooms.
In recent time, numerous groups with their own intentions and ideologies regarding Level Alpha-Omega have formed. However, there is one group far older and larger than the rest, which has sought after Level Alpha-Omega the most. It is a secretive cult known as the Voidseekers, who worship not a being, but the power said to be found within the level. They covet this power for themselves, wishing to use it to shape The Backrooms into their own image. The Voidseekers are so committed to this agenda that they are willing to further it by any means necessary – no matter how immoral. To them, the end justifies their means.
Further Evidence
Following the rediscovery of Level Alpha-Omega's legend and its resulting consequences, a strange series of events began occurring, with cryptic messages relating to it appearing in numerous levels.
The first of these was a note left behind in The Hub by an unknown author. Several copies of the note exist in other levels, and seem to be made by the same person, with the same message:
"Do not be fooled, for the quest to the end does not truly end the nightmare. Seek not for escape, but salvation for all. Only the Crown of the Throne can truly save all, dead or alive. End the nightmare. Seek the truth."
More evidence was later discovered in other levels. Levels with unstable lighting, such as Level 1, would sometimes display messages written with blood on the wall, floor or ceiling, reading the following:
"The Alpha and the Omega. The beginning of the end. The path to the nameless room shall be forgotten to the end of eternity, lest the stars align. Long live the Reign of the Divine One."
There is no apparent pattern to this anomaly, which simply appears and disappears out of nowhere. The chances of it occurring are very rare for the average wanderer.
Instances of the message also seem to have been obtained from the following methods:
Run "topsecret\_ALPHA\_OMEGA" on the computer in The End, and the system will cease function for approximately 99 seconds, displaying only a black screen with the message in white font.
Order any menu item from The Snackrooms with "a sprinkle of truth" or with any variation of the phrase. You will receive a small note on the receipt, containing the handwritten version of the message.
There is another message found in Level 399 that will randomly display on any of the games' screens once every few days/weeks/months:
"The Frontrooms are nothing but an escape. Are you sure that you want to quit the game? An infinite power awaits. The promise of eternal life in everlasting bliss. Find the Key of Salvation, and the Crown of the Throne shall be yours."
The Treasures of the Void
The search for the "Key of Salvation" would lead to the revelation and identification of other legendary artifacts, each revealed by their own mysterious messages. The exact amount of artifacts -- and their origins -- are ambiguous, but each one is believed to be associated with a certain entity. In general, the Treasures of the Void are considered some of the most powerful anomalous objects in the Backrooms. Below are those that have been documented thus far:
Key of Salvation
Description: According to legend, it appears as a golden key with three rings conjoined into a handle, two wings below the handle, a figure that resembles a cube, and three blades at the end - the middle one longer than the others. On the key is inscribed "To the Beginning of the End at the Center of Infinity" in cursive. The key is also said to glow with a soothing warmth.
Location: Unknown, but many believe that The Keymaster has the key. Asking The Keymaster for a key to Level Alpha-Omega would result in him refusing to answer, and possibly even ridiculing the requester. Depending on the person and how they asked, The Keymaster may ask why they seek the key, then advise them to not seek it anymore. Considering this, it is implied that the Key of Salvation may indeed be a real and extremely dangerous object. But whether The Keymaster truly possesses it is still yet to be seen.
Message: The message can be found in any of the supposed "final levels" of The Backrooms, and reads as follows:
"The Frontrooms are nothing but an escape. Are you sure that you want to quit the game? An infinite power awaits. The promise of eternal life in everlasting bliss. Find the Key of Salvation and the Crown of the Throne shall be yours."
Crimson Heart
Description: Currently, there's no reliable description of this item. Some claim it to be a glowing, pulsating red crystal in the shape of an anatomical heart, while others theorize it to be a nonliving object or even a location.
Location: It is theorized to be in Run For Your Life! or some other level that revolves around an unusually extreme amount of violence. Those that subscribe to this theory believe that the "heart" is the living, beating core of the level. Others believe that killing a certain number of entities will grant the heart. The Voidseeker cult, subscribing to this theory, collected the hearts of many creatures in an attempt to find the Crimson Heart. Due to the near-genocide caused by the quest, this sparked internal disagreement. Eventually, they stopped in fear of the M.E.G. persecuting them. There are some other smaller cults that continue this practice, but thus far the theory remains unproven. Another theory is that The Crimson Wanderer possesses the heart, but he of course has never confessed to this.
Message:
"Blessed by the ritual of Bloodbath to purge the Sinners from the world, the Chosen shall embark the path of Bloodshed and reach the Crimson Heart, its beating echoes guiding them to the Alpha and Omega."
Tome of Knowledge
Description: A mythical book of unknown detail, that is said to contain the greatest secrets of The Backrooms. There are several books known across The Backrooms that are theorized to be the Tome of Knowledge.
Location: Most likely a level where books are stored, such as Level 906. The most popular theory posits that The Storyteller is the holder of the book.
Message: Commonly found on any random paper media across The Backrooms:
"Seeker of Knowledge, Rejoice, for thy have been chosen to discover the Truth of the Alpha and Omega! Seek the Tome of Knowledge, and every tale of the past, present and future shall be revealed before your very eyes."
Card of Truth
Description: Currently, the physical description of the item is a highly debatable topic. It is known to be a playing card of some sort, but the exact game it belongs to is a point of contention.
Location: It is believed to be in the possession of Jester.
Message: Can be seen through various media, but initially discovered by opening CARD0.txt on the computer terminal in The End;
"Myriads of consciousness seek the One across the Infinite, but there it no light across the Void. The Key may open the gate at the Center of Infinity, but the Card is the ticket to the journey. Obtain the Card of Truth, and the path will be revealed."
Healing Harp
Description: Rumored to be a holy harp that is completely painted in gold, decorated with white lilies and roses growing on its surface. Legends say it was crafted from the wood of a sacred tree that grew fruits which could heal any sickness. They also say that if one were to play the harp, their body and mind would be cleaned of any impurity, and heal from any wound or curse.
Location: The Priestess is believed to be in possession of the Harp. Some speculate that she may have hidden it somewhere far away, where only those pure of heart may find it.
Message: Found underneath a dead tree surrounded by wilted flowers:
"Pure-hearted being, seek the gentle Harp that cures the body and mind. You who were chosen shall use it to become a kind and merciful ruler. Bring peace and prosperity, caress its strings for a future less grim. And then, you shall never fear again."
Entities
If Level Alpha-Omega is indeed a sublevel of the Hallowed Gate, then it stands to reason that the resident entities of the Hallowed Gate would also be present there, such as Paragons, Void Cells and Constructs.
Beyond this, there are not any entities that are confirmed with certainty to have inhabited Level Alpha-Omega. However, there does exist The Legend of The Court, which speaks of a king and his royal court. It is believed that this legend refers to Level Alpha-Omega, and that the members of the court described in it are in fact real beings which may still exist today. Scholars have drawn strong parallels between the court members and documented entities, such as "The Knight" with the Crimson Wanderer. This in turn gives credence to the theory that each of these entities possess one of the Treasures of The Void.
Entrances and Exits
While there are no confirmed methods to enter or exit the realm, there are numerous rumored methods. One is that Level Alpha-Omega may be accessed from within the Hallowed Gate, but given its fortitude against outsiders, it would be difficult to test this. Another theory is that it may be accessed from one of the ornate level doors within the tower of The Hub, however this cannot easily be proven either.

\*From the other backrooms wiki