Description
A picture of the landscape
Level 原始(Level Primal), 有时又被称作“失落世界”。因为探索过的人为数不多,它仍是是后室中谜团甚多的一个楼层。该楼层的时间处于中生代——“爬行动物时代(原文为恐龙时代)”,相当危险:火山零零落落地分散在地表,各种独有的巨型实体存在于这里。这里的气候比当今的地球更加温暖,地表被旱地灌木林、热带雨林和沼泽湖覆盖,史上最大的实体——本层的水怪在其中生活。恐龙与各种庞大的史前生物漫游于此,使得这里的居民“洞穴无面人”(无面人的祖先)相形见拙。这一楼层是众多被称作“过去”或者“地球的幼年”中的一层,通常以“史前楼层”被人们知晓。
实体
Caveling“洞穴无面人”:Facelings(无面人)的祖先。
Cynodont“犬齿龙”:一种凶猛好斗,长相可怖的主要哺乳动物。看起来像狗和蜥蜴的杂交后代(实际上是二叠纪与三叠纪间的一个物种)。
Hellraptor“迅猛狱龙”:一种长相丑陋的异爪科恐龙。它会使用鸡壮的冠像斧子一样切削它的受害者。
Komodo dragon“科莫多巨蜥”:一种凶猛的实体。成体会吃同类的幼体,有时吃其他的成体。能迅速运动,偶尔攻击人类;但主要以腐肉为食。
Mammoth turtle“猛犸龟”:长角的巨型杂食乌龟。什么都吃。
Terrordactyl (a 2.5-meter-tall pterosaur with a dense coat of pcynofibers (fur-like filaments). He swoops in at it's unsuspecting prey and grabs them with it's toothy jaws)
Giant spider (just a giant spider that is terrifying)
Murder Rex (an extremely-bloodthirsty theropod, 10 meters in length (not actually a T. rex). Uses it's long claws to shred it's prey into pieces)
The Water Monster of Level Primal (a huge pliosaur that lurks the in the huge lakes and other water bodies of Level Primal. It is yet to be officially named. People still don’t know it’s size, as encounters are extremely rare, but the largest estimates are about 2 miles long, much bigger than the Jeddah Tower of Saudi Arabia, probably making it the largest entity of the backrooms. It will eat almost anything that it can see, even huge inedible buildings
Note: other entities like other dinosaurs and other prehistoric creatures can be found as well
The Rhynchosaurs (A group of entities resembling those of the order Rhynchosauria, they have cheek pouches and porcine snouts unlike most other descriptions of rhynchosaurs, they can be a little miffed at any time)
Entrance
Drown in a pool of Almond Water in Level 5678
Sometimes in Level 50 or above there'll be a time machine embedded in the wall, you only have a few minutes or it will dissappear.
You can also go to Level 11’s Backrooms Museum. The room which will soon have the new Murder Rex specimen dubbed "Rex" has a time machine too, that won’t disappear.
Level 173
Exit
The few ways to exit are to wait for the asteroid to hit the Yucatan Peninsula or just die.
also Level 173
You can also drown in the lake where the unknown Water Monster lives in to be transported to Level 5678.
Colonies and Outposts
The only ones you can find around Level Primal are caveling tribes, but they are mostly territorial to intruders.