Level 75 resembles an endless stair case. You can only enter here from nocliping out of earth somehow, but on rare occasions, you won't end up at level 0, you will end up at level 75. Each level of stair has a door, some are unlocked, and some are not. Each door leads to endless hallways and empty rooms. You could find an escape in there, but will only lead you too Level 0. Each hallway has... something inside.
Any door that says danger, DO NOT OPEN. Only open it if you put your ear to the door, and hear nothing. If you hear something like crying, static, thumping, whimpers, or heavy breathing, go up or down at least 10 levels. All danger doors are unlocked, that lets what is outside in, or what is inside, out.
Try to minimize making noise, as whatever is trapped with you has heard you, and wants to get out. Avoid going insane, as the more crazy you get, the more powerful they become. Some of these monsters will make noises of distress, like screams for help, crying, and yelling the names of their loved ones. Whatever you do, don't try to help them.
There is a rare chance of coming across another human trapped inside. If they have large scars or wounds on their body then run away from them as fast as possible. It is okay if you return to the staircase, which if you jump down the middle, you will gain lots of ground. However, the staircase has no end, so you would continue falling. trying to grab onto the hand rail while falling would rip of your hand or arm from the force of the fall, unless you are lucky, which not many people are. If your arm or hand is ripped off, then you will slowly bleed out while falling down, and you body would be forgotten, falling down the endless void of Level 75.
There is a rare chance of coming across random objects that no clipped through the walls, scattered around 75. They go from pencils, to firearms, and even small cars and trucks. One human was very lucky, and found an old ham radio, and managed to communicate to a military base. the Conversation goes here. He is known as 75-A.
Operator: This is Fort Benning, we hear your distress signal, over.
75-A: God thing thing finally works, who am I talking to?
Operator: A radio operator at Fort Benning, Georgia, USA, and who am I talking to? Over.
75-A: My name is Victor Brooks, I got stuck here in this place, I don't know where I am, or what the year is. I've been here for 2 months, and I got here in 1984.
Operator: It's 2018 right now... Over.
75-A: Oh god...
Operator: Where the hell are you! Just tell me!
75-A: I don't know!
Operator: Then tell me what you do know!
75-A: Tells the operator all the information we have, it takes about 30 minutes to explain.
Operator: Well... I guess time in there has slowed down then our time.
75-A: Yea, I found this weird moving thing on a screen that told me my location, like a radar, but more complex, and every step I took, I traveled a mile on the map thingy. So I guess I've traveled lots of land so far, I was in my home in North Carolina when I heard some strange noises on the other side of my wall, I thought an animal was there, so I ripped out part of the wall only to find a strange black portal thingy there, and being the idiot that I am, I walked through it, and ended up here.
Operator: Yea, and you said that stuff just came out of walls through the portals, and you said that's how you got the radio? The map thingy is called a GPS.
75-A: Yea that's true, I've even found cars and buses down here.
Operator: Well, a vintage radio went missing a couple years ago, so that explains a lot.
Strange noises are heard over the 75-A's radio.
75-A: I got to go, they are here...
Operator: Who! Who is here!
The radio is heard being picked up and a shot gun being pumped and fired by 75-A. This is followed by running and heavy breathing.
*Radio cuts off*
Operator: Victor! Can you hear me! Victor! Oh god....