Serious Sam 3 SFOE: Places where you can get behind the map are absolutely fair

In this guide, you will learn how and where you can get out of the map without cheats.,
I didn't find a lot of places and some of them were checked in co-op mode.
And further, this is my first guide do not judge strictly.
If something is not clear at all, I can add video material.

No shelter

Find this place.
Then hop in like this.
Everything! You are behind the map.
The main thing is not to fall into this hole

And yes, do not pay attention to the fact that my cheats are cut.

Dumb riddles

You have to run here.
From the beginning we find this place(it is on the right side of the beginning of the map).
And we run around the corner.
Then we run along the wall(4: You have to climb on thick brick wall) and go wherever you want.
Well that's it, you are behind the map again.

After you exit the Pyramid, turn left and walk to the end of the Pyramid,
Then to the left, pressing against an invisible wall, we run and jump.
As soon as you reach the rear end of the pyramid, immediately climb it
You conquered the pyramid, Congratulations!

From KoBOLTA silent