First, you will want to install this addon. (You will need this to start the easter egg!)
Day/Night Cycle (Industrial17) This addon is for industrial only. It will not work for any other map.

First, when you load into the map, you will want to go to the entrance of Shell Beach.
Then noclip up till you are on the train tracks.

When you are done with that, you will want to open the console then type dnc_settime 19:00

After you typed the command, look up in the sky to see if there is light like this.

Now you are ready for the next part.

You will want to enter the building above the train tracks that looks likes this.

When you enter the building, you will see a sparking box on the wall. You will want to press "E" on it.


After you press "E" on it, you will hear the combine shield going down and you can enter it. (Btw the shield will stay open until someone enters it.)

When the shield is open, walk down the tunnel.

Then you will fall in a big hole that leads to a hallway.

When you walk down there, you start hearing weird sounds. Then the walls are shaking, and creepy pictures are flying past you. Then, slowly, the door opened. Then you walk in the dark room and hear some more weird sounds, then you will see this!

You will see that about 2 seconds, then you teleport back to the train tracks.

I hope you enjoyed this guide and helped you to find the Easter Egg!
If there are any errors, let me know so i can fix them!

Have a good day and good bye!