• Only works on certain double doors, and only on one corner of the door.
  
• Locked doors may or may not be possible to climb.
  "Trying every door would require a lot of time, so I'm not going to bother."
  
• Windows and the walls around lifts are lower, and can prove difficult to cross.
  
• Open doors and broken windows can not be walked across.
  
• Higher frame rates appear to make doors easier to climb, 60 FPS is enough.
  "This is not a frame rate guide, you will need to look elsewhere if you need help with this."
  
• Works in co-op, depending on your connection(ping) you may find it harder to do.
  "I can not fix your connection, but switching host can help."

• Double doors only, as they will stay closed if you approach them from the side.

"The image to the right should be clear enough, so I'm not going into too much detail here."

Notice how the top 2 doors have the same general shape, where they come together is the same design. So visually they look different to each other, but they seem to use the same physical structure and animation.

The last door is very different visually, and would also seem to be different in its physical structure.
"I have not been able to climb this type of door, maybe you might have better luck."

1. Finding the correct corner to climb, as marked on the image in the Valid doors section.
   Look for the grey circle on the door, when you look at the door this should be on the left side.
   "For elevator doors, the yellow sticker should be on the left side."
   
   
2. The other part of the door appears to be longer, so when looking at the door this should be on the right side.
   
   "You should now be standing on the correct side of the door, I hope.
   Next comes the fun part."
   
   
3. Walk forwards, towards the corner of the right side of the door.
   "The aim being to push against the door, without it opening."
   
   
4. Keep walking forwards whilst also slowly moving to the left, this will cause the door to open.
   "For some strange reason the door should start to push you up.
   That can mean only one thing, it's time to climb."
   
   
5. Keep walking forwards, whilst slowly moving left and right until you reach the top of the door.
   "The trick is to not let the door open all the way."

Hopefully you can now go exploring the tops of the walls, enjoy.
"If you find yourself still standing on the floor, you should probably try again."